Company patents
FUJIKIN INCORPORATED
Fujikin Incorporated's patent strategy reveals a surprising shift away from its core "Valves" category, which, despite comprising 51.8% of its portfolio, saw a significant 46.2% decline in 2025 and a further 78.6% drop so far in 2026. While most categories show a sharp decline in patenting activity in 2026, the company appears to be maintaining some focus on "Force / Pressure Measurement," which, after a substantial 400.0% growth in 2024, has held steady with 2 patents so far in 2026.
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.
110 US filings (since 2023) · 10 categories · 21 themes
Mechanisms and control systems for precisely moving valve elements, often involving electric motors, cams, solenoids, or pneumatic/hydraulic pilots, to achieve desired flow or position.
Incorporating sensors and processing capabilities directly into valve systems to monitor operational state, detect malfunctions, measure flow parameters, or verify proper installation.
Valves specifically designed for managing fluid power in hydraulic or pneumatic systems, including components for pressure regulation, flow direction, and system centering.
Innovations in the construction, integration, and operational verification of flow measurement devices, including methods for calibration, fault detection, and structural integrity monitoring.
Technologies for measuring the flow rate, level, or composition of mixtures containing multiple fluid phases (e.g., liquid-liquid, liquid-gas, liquid-solid suspensions), often employing specialized sensing principles to differentiate components.
Systems and sensors designed to measure the pressure difference between two distinct points or to capture rapid, transient pressure fluctuations in fluid or gas systems, often using diaphragms or pistons.
Specialized valve designs for domestic and commercial applications involving water distribution, temperature control, and air conditioning, often focusing on integration, materials, and specific flow characteristics.
Measures force or pressure by detecting changes in electrical capacitance. This typically involves the deformation of a dielectric material or the relative movement of conductive plates, altering the distance or area between them.
Mechanisms allowing rapid, secure, and often sealed attachment and detachment of pipes, tubes, or hoses, frequently featuring locking, sealing, and release components for efficient assembly and maintenance.
Methods and systems for detecting fluid or gas leaks, or assessing the quality and continuity of seals in containers, systems, or structures. This often involves pressure changes, electrical properties, or acoustic analysis.
Couplings and fittings designed for specific fluid properties (e.g., cryogenic, chemical, medical, high-pressure) or requiring aseptic conditions, low-spill characteristics, or antimicrobial features to ensure safety and integrity.
Systems and methods for automated substrate transport, precise positioning, temperature regulation, and chamber environment management to ensure process stability, uniformity, and yield in semiconductor manufacturing.
Sensors and systems designed to detect and quantify localized contact forces, pressure distribution, or touch interactions, often employed in robotics, human-machine interfaces, or object manipulation applications.
Valves engineered to automatically open or close based on pressure differentials, preventing over-pressurization, controlling flow direction, or suppressing backflow in fluid systems.
Systems and methods for real-time sensing, modeling, and closed-loop control of additive manufacturing parameters to ensure part quality, consistency, and process efficiency. This includes thermal management, atmospheric regulation, and precise material deposition.
Systems and methods for repairing, reinforcing, or isolating existing pipes, often involving internal lining, curing processes, or sealing techniques without extensive excavation or replacement.
Sensors that quantify strain or deformation by measuring the change in electrical resistance of a material, such as a semiconductor film or conductive layers, as it undergoes mechanical stress.
Tubes, hoses, or ducts incorporating additional components or features beyond simple fluid conveyance, such as embedded electronics (sensors, heaters), structural reinforcement, or segregated compartments for cable routing.
Design and engineering of specialized components within deposition systems, such as heaters, targets, susceptors, and chamber walls, to achieve precise control over process parameters like temperature, material flux, and plasma characteristics.
Devices and methodologies for precisely measuring rotational force (torque) or linear pulling force (tension) within mechanical systems, frequently incorporating compensation for environmental variables like temperature.
Connectors, seals, and tubing solutions specifically designed for pipes, ducts, or conduits that deviate from standard circular cross-sections, or require flexible/collapsible forms for specific applications or installation challenges.
Patents
Showing 1-10 of 53
Flowmeter Design & Diagnostics