Company patents

FURUKAWA ELECTRIC CO., LTD.

FURUKAWA ELECTRIC CO., LTD. appears to be shifting its focus away from traditional power and energy storage technologies, evidenced by a significant decline in patenting for Batteries & Fuel Cells (YoY -100.0% so far in 2026) and Cables & Conductors (YoY -72.7% so far in 2026). While maintaining a strong core in Optical Elements & Systems (23.1% of portfolio), the company shows a surprising emerging focus on Welding & Soldering, which saw a 42.9% YoY growth in 2025.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

642 US filings (since 2023) · 12 categories · 50 themes

Cable Termination & Management

Systems and methods for preparing, organizing, and electrically connecting individual conductors or cable bundles to connector terminals, ensuring reliable contact and strain relief.

Electrical ConnectorsCables & ConductorsPower Cable Installation
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69since 2023
-27.3%YoY
Laser Module Packaging

Methods and structures for assembling laser chips into functional modules, encompassing optical alignment, electrical interconnection, mechanical support, thermal management, and encapsulation for protection.

Lasers
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57since 2023
+5.9%YoY
Advanced Heat Exchanger Architectures

Novel designs and configurations for heat exchangers that improve heat transfer efficiency, compactness, or enable specific phase change or separation processes within refrigeration and heat pump cycles.

Heat Exchangers (Specific Types)
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48since 2023
+6.7%YoY
Optical Fiber Sensing Systems

Systems and methods that utilize optical fibers as sensing elements or for transmitting sensing signals, often for distributed monitoring of environmental conditions, phase changes, or integrating sensing with communication.

Optical Elements & Systems
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47since 2023
-22.2%YoY
Lasers for Optical Communication

Design and integration of lasers and associated components specifically for transmitting data over optical fibers or through free space, including modulation schemes and efficient light coupling.

Lasers
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44since 2023
-7.7%YoY
Semiconductor Laser Fabrication

Techniques for manufacturing semiconductor laser chips, including active region design, mirror structures, current and optical confinement, and the integration of multiple layers or elements on a substrate.

Lasers
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41since 2023
0.0%YoY
Two-Phase Cooling Devices

Heat transfer devices that utilize the phase change of a working fluid (evaporation and condensation) to efficiently move heat, often incorporating capillary structures, heat pipes, or vapor chambers.

Heat Exchangers (Specific Types)
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40since 2023
-13.3%YoY
Polymer Composites with Functional Fillers

Polymer compositions incorporating inorganic or organic filler materials to impart specific functional properties such as thermal conductivity, flame retardancy, electrical conductivity, or enhanced mechanical strength and dimensional stability.

Polymer Compositions
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38since 2023
+66.7%YoY
Cable Harness & Armor Design

Structural design and manufacturing techniques for bundling multiple wires into harnesses, including protective layers like braiding and interlocking armor, and methods for assembly and termination.

Cables & Conductors
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38since 2023
-10.0%YoY
Specialized Conductor Formulations

Development of new conductive materials, including powders, composites, and alloys, designed for specific electrical performance, manufacturing processes, or applications beyond basic copper wires.

Cables & Conductors
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36since 2023
-50.0%YoY
Fiber Laser Systems

Systems and components related to fiber lasers and fiber optical amplifiers, including doped fibers, pump schemes, and specialized fiber structures for gain, filtering, or thermal management.

Lasers
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29since 2023
-12.5%YoY
Power & Hybrid Connector Design

Connectors specifically designed for high current or voltage applications, often incorporating features for power delivery, thermal management, or combining power and signal lines.

Electrical Connectors
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26since 2023
-54.5%YoY
Laser Material Processing

Techniques and systems utilizing laser beams for precise material modification, including cutting, cladding, ablation, and surface treatment, often for joining, shaping, or removing material.

Welding & Soldering
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25since 2023
+80.0%YoY
Battery Electrode Coating & Slurry

Slurry compositions and coating processes for battery electrodes, including binder/active-material slurries, surface coating layers, and electrode-to-foil adhesion for cathode and anode.

Batteries & Fuel Cells
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25since 2023
n/a
Power Systems with Energy Storage & Grid Interaction

Integration of power converters with energy storage devices (batteries, supercapacitors) or grid interfaces, often involving AC/DC conversion, power flow management, and fault handling for hybrid power systems or specific applications like EVs or PV.

Power Distribution & Storage
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22since 2023
+200.0%YoY
Advanced Cable Insulation & Sheathing

Development of polymer compositions and material structures for electrical insulation and protective sheathing of cables, focusing on properties like flame retardancy, flexibility, and semiconductivity.

Cables & Conductors
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22since 2023
+40.0%YoY
Welding Process Control

Systems and methods for precisely controlling welding parameters such as power, speed, oscillation, and material feed to optimize weld quality, consistency, and efficiency, often involving automated or semi-automated processes.

Welding & Soldering
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21since 2023
+75.0%YoY
Battery Management Systems

Software, algorithms, and associated hardware for monitoring, controlling, and optimizing battery performance, safety, and lifespan, including charge/discharge cycles, thermal regulation, and system integration.

Batteries & Fuel CellsPower Distribution & Storage
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21since 2023
-81.8%YoY
Robust Electrical Contact Systems

Design of contact elements and their interaction to ensure stable, low-resistance electrical connection under various mechanical and environmental conditions, including spring forces and material choices.

Electrical Connectors
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19since 2023
+40.0%YoY
Novel Catalyst Materials

Development and synthesis of catalysts with unique compositions or structures, such as medium entropy alloys, metal foam-supported catalysts, layered catalytic articles, or high-entropy oxides, to enhance activity, selectivity, or stability in chemical reactions.

Catalysts & Reactors
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16since 2023
-57.1%YoY
High-Performance Thermally Stable Resins

Polymer compositions engineered for enhanced heat resistance, thermal stability in molten states, or improved processability at high temperatures, often involving specific copolymers, blends, or stabilizing additives for applications in electronics or automotive.

Polymer Compositions
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15since 2023
+400.0%YoY
Tunable Laser Sources

Mechanisms and designs for actively changing or stabilizing the output wavelength, frequency, or spectral properties of a laser, often involving integrated optical filters, resonators, or pump adjustments.

Lasers
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14since 2023
0.0%YoY
Welding & Soldering Tool Design

Design and features of welding and soldering tools, fixtures, and accessories that enhance user safety, ergonomics, operational efficiency, and precise workpiece manipulation, including protective equipment and clamping mechanisms.

Welding & Soldering
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14since 2023
+33.3%YoY
Photonic Integration & Interconnects

The design and manufacturing of integrated circuits that combine optical and electronic components, particularly for high-speed data communication between processors and memory.

Optical Elements & Systems
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10since 2023
+150.0%YoY
Solid-State Battery Manufacturing

Process and equipment for producing solid-state battery cells, including solid electrolyte synthesis (sulfide/oxide/polymer), thin-film deposition, lamination, sintering, dry-electrode fabrication, and stacking under controlled atmosphere.

Batteries & Fuel Cells
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10since 2023
-60.0%YoY
Electronic Component Bonding

Specialized welding or bonding techniques and apparatuses tailored for joining small-scale electronic components, integrated circuits, or semiconductor wafers, emphasizing precision, miniaturization, and electrical connectivity.

Welding & Soldering
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9since 2023
+50.0%YoY
Connector Locking Mechanisms

Mechanical features or components integrated into connector housings or mating interfaces to ensure secure engagement and prevent accidental disengagement.

Electrical Connectors
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9since 2023
-33.3%YoY
Carbon Dioxide Capture & Conversion

Technologies and materials for capturing carbon dioxide from gas streams and subsequently converting it into valuable chemical products or materials, rather than simply storing it.

Catalysts & Reactors
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9since 2023
-50.0%YoY
Advanced Adsorbent & Separation Media

Development of materials with tailored porosity, surface chemistry, or structure, such as metal-organic frameworks (MOFs), zeolites, or superficially porous particles, for selective adsorption, ion exchange, or chromatographic separations.

Catalysts & Reactors
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8since 2023
-33.3%YoY
Solar Power Integration & Applications

Systems that incorporate solar panels as a primary or auxiliary power source for various applications, including visual displays, remote devices, and portable battery charging, often emphasizing efficiency and adaptability.

Power Distribution & Storage
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6since 2023
new
Advanced Optical Imaging & Lens Design

Development of sophisticated optical lens assemblies and computational methods to achieve high-resolution, precise, or specialized imaging, often for medical or scientific applications.

Optical Elements & Systems
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5since 2023
+100.0%YoY
Internal Flow Path Optimizationfiltered

Techniques and structures within heat exchangers designed to enhance heat transfer efficiency by controlling and optimizing fluid flow, including baffle arrangements, jet impingement, and condensate management.

Heat Exchangers (Specific Types)
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5since 2023
0.0%YoY
EV Thermal Management Systems

Systems designed to manage the temperature of multiple components in electric or hybrid vehicles, such as batteries, electric motors, power electronics, and the passenger cabin, often using shared or interconnected cooling/heating circuits.

Batteries & Fuel Cells
Who else files here? →
5since 2023
new
Modular & Hybrid Power Supply Systems

Design and control of power supply architectures that combine multiple power sources (e.g., AC grid, DC battery, generators) or modular battery units, often featuring switching, conversion, and redundancy for enhanced reliability and flexibility.

Power Distribution & Storage
Who else files here? →
5since 2023
0.0%YoY
Refrigeration Cycle Components

Specific heat exchanger designs and auxiliary components tailored for integration into refrigeration, air conditioning, or heat pump systems, often involving gas-liquid separation or rotary mechanisms.

Heat Exchangers (Specific Types)
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5since 2023
0.0%YoY
Battery Pack Mechanical Design

Focuses on the structural integrity, housing, mounting, and physical integration of battery cells into robust and protected packs within electric vehicles, including manufacturing considerations.

Batteries & Fuel Cells
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4since 2023
0.0%YoY
Lithium Battery Anode Materials

Active anode materials and manufacturing techniques for rechargeable lithium-ion batteries, including silicon-carbon composites, graphite, lithium-metal anodes, and electrode coating processes that improve capacity, cycle life, and rate capability.

Batteries & Fuel Cells
Who else files here? →
4since 2023
n/a
EV Charging Systems & Control

Technologies for efficiently delivering power to electric vehicles, encompassing fast charging, wireless charging, and smart grid integration, alongside vehicle-side control and management of the charging process.

Power Distribution & Storage
Who else files here? →
3since 2023
new
Cable Deployment & Pulling Equipment

Tools and machinery specifically designed to facilitate the installation of cables by pulling, pushing, or laying them over distances or through conduits, often employing mechanical advantage or specialized vehicles.

Power Cable Installation
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3since 2023
new
Laser Safety and Control

Techniques and systems for ensuring the safe and precise operation of lasers, including power regulation, hazard detection, and deconfliction mechanisms in complex or dynamic environments.

Lasers
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3since 2023
-50.0%YoY
Advanced Electronic Packaging

Methods and structures for integrating and enclosing electronic components into compact, multi-functional modules, often involving embedded components, multi-layer substrates, and electromagnetic shielding for performance and miniaturization.

Printed Circuits & Electronic Assemblies
Who else files here? →
3since 2023
0.0%YoY
Flexible and Printed Circuitry

Manufacturing processes and material compositions for creating electronic circuits on flexible or conformable substrates, enabling novel form factors, enhanced durability, and new applications beyond rigid PCBs.

Printed Circuits & Electronic Assemblies
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3since 2023
new
High-Speed Signal Integrity

Design techniques and components within connectors to minimize signal degradation, crosstalk, and impedance mismatches for high-frequency data transmission.

Electrical Connectors
Who else files here? →
3since 2023
n/a
Wireless Power Transfer Systems

Systems and methods for transferring electrical energy without physical contact, often utilizing inductive or resonant coupling, including antenna design, resonance tracking, and control mechanisms for efficient power delivery.

Power Distribution & Storage
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2since 2023
new
High-Barrier Packaging Films

Multi-layer polymer films engineered to provide superior barrier properties against gases (e.g., oxygen), moisture, or aromas, often incorporating heat-sealing or resealing mechanisms for food and product preservation.

Polymer Compositions
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2since 2023
new
Elastomer Formulations for Performance

Development of rubber and elastomer compositions, often involving specific polymer blends, additives (e.g., process oils, reinforcing agents), and cure packages, to achieve desired mechanical properties like abrasion resistance, wet grip, shear durability, or flexibility for demanding applications.

Polymer Compositions
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1since 2023
new
Battery Material Recovery

Processes and apparatus for disassembling spent batteries and recovering valuable materials (e.g., metals, electrolytes, plastics) through mechanical, chemical, or electrochemical methods for reuse or sustainable disposal.

Batteries & Fuel Cells
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1since 2023
n/a
Emerging Contaminant Removal

Specific techniques and materials developed to remove persistent or difficult-to-treat pollutants from water, such as per- and polyfluoroalkyl substances (PFAS), micropollutants, or specific industrial chemicals.

Catalysts & Reactors
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1since 2023
n/a
Advanced Solder & Flux Formulations

Development of novel chemical compositions for fluxes, solders, and filler metals to improve material properties, enhance joint reliability, reduce defects, or meet specific application requirements like high-temperature reflow or specialized material joining.

Welding & Soldering
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1since 2023
n/a
Cable Stripping & Cutting Tools

Handheld or motorized tools designed for efficiently removing insulation (stripping) or severing (cutting) electrical wires and cables during installation or maintenance processes.

Power Cable Installation
Who else files here? →
1since 2023
n/a

Patents

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US 20250180299 A1APPLICATION
F28D15/04

HEAT PIPE

Filed:2025-02-07Pub:2025-06-05
Applicant:FURUKAWA ELECTRIC CO., LTD.

A heat pipe is provided that that can raise the efficiency of circulation of a working fluid, and thereby possesses a superior thermal transport property. A heat pipe 1 includes a container 2 having an internal space S in which a working fluid F is sealed, the container 2 including: a evaporation portion 3 that evaporates a liquid-phase working fluid F L to change phase to a gas-phase working fluid F g ; a condensation portion 4 arranged at a position that is separated from the evaporation portion 3 , and condenses the gas-phase working fluid F g to change phase into the liquid-phase working fluid F L ; and a middle portion 5 positioned between the evaporation portion 3 and the condensation portion 4 ; in which, viewing a transverse section of the evaporation portion 3 , the heat pipe includes: a first sintered body layer 6 consisting of a sintered body of a first copper powder, and formed in a specific area on an inner circumferential surface 2 a of the container 2 ; and a second sintered body layer 7 consisting of a sintered body of a second copper powder having a larger average particle size than the first copper powder, and formed annularly over an entirety of an inner circumferential surface 2 a of the container 2 , in a state in which the first sintered body layer 6 is interposed between the inner circumferential surface 2 a of the container 2 and the second sintered body layer.