Company patents

HITACHI ASTEMO, LTD.

HITACHI ASTEMO LTD. shows a surprising patent strategy with a strong, albeit fluctuating, focus on automotive and electrical power technologies, alongside emerging interests in computing. While Vehicle Control Systems (16.5% of portfolio) remains a core area, the rapid growth in 2024 for Printed Circuits & Electronic Assemblies (+152.0% YoY), Software Development & Compilers (+125.0% YoY), and Computer Security (+120.0% YoY) suggests a strategic pivot towards integrating advanced electronics and software into their offerings, despite a general decline in patent filings across most categories in 2025 and 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.

1,870 US filings (since 2023) · 12 categories · 44 themes

Electric Powertrain Efficiency & Control

Methods and components for optimizing the performance, efficiency, and control of electric motors, inverters, and power converters within electric vehicle and hybrid vehicle drivetrains.

Vehicle Control Systems
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255since 2023
-20.7%YoY
Advanced Braking Control & ADAS

Software-driven control strategies, sensor integration, and diagnostic methods for enhancing braking performance, driver assistance systems (ADAS), and autonomous vehicle braking functions.

Vehicle Brake Systems
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220since 2023
-1.4%YoY
Electric Parking Brake Control

Systems and methods for controlling electric parking brakes, including their actuators, redundancy features, and diagnostic capabilities for ensuring reliable operation.

Vehicle Brake Systems
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208since 2023
-41.9%YoY
Advanced Motor Control Algorithms

Sophisticated software or hardware-implemented control strategies that optimize motor performance, such as precise speed/torque regulation, vibration reduction, or efficiency, often using model-based, predictive, or adaptive techniques.

Motor Control
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176since 2023
-5.3%YoY
Advanced Steering Control

Electronic, hydraulic, or steer-by-wire systems that precisely control vehicle direction, often incorporating feedback loops, compensation, and adaptation for various driving conditions or vehicle types.

Vehicle Steering & Bodies
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137since 2023
-39.3%YoY
Inverter and Drive Circuit Control

Methods and circuits for controlling the power electronic converters (inverters, bridges) that supply current and voltage to electric motors, including switching strategies, voltage command generation, and multi-phase configurations.

Motor Control
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128since 2023
+2.6%YoY
VRU Protection & Localization

Systems and methods for enhancing the safety of vulnerable road users (pedestrians, cyclists) by improving their detection, prediction, and precise localization relative to the vehicle, often leveraging communication technologies and specialized markers.

Vehicle Control Systems
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124since 2023
-4.7%YoY
Braking & Stationary Vehicle Control

Control systems for managing vehicle braking and maintaining a stationary state, including brake pedal actuation sensing, automatic brake hold functions, and coordination with parking brakes.

Vehicle Control Systems
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99since 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
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90since 2023
+6.7%YoY
Electromechanical Braking Systems

Actuators, control, and components for converting electrical energy into braking force, often involving motors, spindles, and friction elements, particularly for vehicle applications.

Vehicle Brake Systems
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85since 2023
-55.6%YoY
Power Electronics Integration

Design and assembly of power conversion, distribution, and protection modules, focusing on compact form factors, efficient electrical connections, and robust protective measures for electronic systems, often in high-power applications.

Printed Circuits & Electronic Assemblies
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68since 2023
-45.2%YoY
Stator & Coil Manufacturing

Manufacturing processes and techniques for producing stator cores, windings, and coils, including lamination, impregnation, hairpin winding, and segment coil bending, to improve motor efficiency, power density, or reliability.

Electric Motors & Generators
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65since 2023
+5.3%YoY
Cooperative Driving & Maneuver Planning

Algorithms and systems for planning and executing complex vehicle maneuvers, often involving cooperation with other vehicles or infrastructure, to optimize traffic flow, avoid collisions, or navigate challenging scenarios. This includes lane changes, cut-ins, and traffic congestion.

Vehicle Control Systems
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62since 2023
-44.0%YoY
Advanced Motor Topologies

Development of novel motor architectures beyond traditional radial flux designs, including linear, axial, or multi-armature configurations, often to optimize for specific performance characteristics like torque density or form factor.

Electric Motors & Generators
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59since 2023
+11.1%YoY
Advanced Power Converter Topologies

Focuses on novel circuit configurations for DC-DC, DC-AC, or AC-DC conversion, often involving resonant operation, multi-level structures, or switched capacitors to improve efficiency, power density, or voltage conversion ratios.

Power Conversion (DC/AC, DC/DC)
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59since 2023
-25.0%YoY
Device Enclosure & Material Engineering

Methods and materials used to construct robust and protective enclosures for electronic devices, focusing on structural integrity, impact resistance, thermal dissipation, and specialized material properties for enhanced durability.

Printed Circuits & Electronic Assemblies
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54since 2023
+5.0%YoY
Motor System Fault Detection

Methods and systems for identifying anomalies, failures, or impending issues within electric motors or their associated drive and power management circuits, often by monitoring electrical or operational parameters.

Motor Control
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52since 2023
0.0%YoY
Package Thermal Management

Integrated solutions for dissipating heat generated by high-density semiconductor devices within the package, including embedded cooling structures, cold plates, and optimized fluidic channels.

Power Conversion (DC/AC, DC/DC)
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47since 2023
-40.9%YoY
Trailer & Towing Management

Technologies for safely and efficiently connecting, stabilizing, and maneuvering trailers, including hitch mechanisms, load sensing, and trailer-specific steering or stabilization.

Vehicle Steering & Bodies
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47since 2023
-52.0%YoY
Remote Software/Firmware Updates

Systems and methods for securely and reliably delivering, installing, and managing software or firmware updates to distributed or embedded devices, often considering network conditions, resource constraints, or storage repartitioning.

Software Development & Compilers
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45since 2023
-31.2%YoY
Sensor-based Environment Perceptionfiltered

Techniques and hardware for autonomous systems to gather and interpret data about their surroundings, including obstacle detection, object recognition, and depth estimation, to inform control decisions.

Computer Vision
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43since 2023
+8.3%YoY
Motor Power and Energy Management

Strategies and circuits for optimizing the supply and consumption of electrical power for motors, including current limiting, regenerative energy handling, battery integration, and managing power quality.

Motor Control
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41since 2023
-8.3%YoY
Autonomous System Redundancy & Validation

Techniques and architectures for ensuring the reliability, fault tolerance, and performance validation of autonomous driving systems, including redundant computing platforms and perception system monitoring.

Vehicle Control Systems
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28since 2023
-36.4%YoY
Sensorless Motor Control

Techniques for determining the rotor position, speed, or other operational parameters of an electric motor without dedicated physical sensors, often relying on back-EMF, current, or voltage measurements.

Motor Control
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25since 2023
+400.0%YoY
Vision-Based Object & Pose Estimation

Methods and apparatus for detecting objects and determining their three-dimensional position and orientation (pose) using imagery or point cloud data, often for navigation, surveying, or environmental understanding.

Computer Vision
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25since 2023
+33.3%YoY
Hydraulic Brake System Components

Design and optimization of the core hydraulic elements of a brake system, including master cylinders, valves, pistons, fluid reservoirs, and their associated sealing mechanisms.

Vehicle Brake Systems
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19since 2023
-66.7%YoY
Vehicle Body Structural Design

Innovations in the materials, manufacturing, and assembly of vehicle body components to enhance rigidity, crashworthiness, and functional integration.

Vehicle Steering & Bodies
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18since 2023
-16.7%YoY
Smart Parking Systems

Integrated systems for managing parking facilities, guiding vehicles to available spots, and providing notifications, often leveraging sensors, communication, and remote control.

Vehicle Control Systems
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15since 2023
-88.9%YoY
Control & Stability for Power Converters

Techniques and circuits designed to regulate output, manage input variations, mitigate resonance, or ensure stable operation of power converters under diverse load and source conditions. This includes adaptive, predictive, or fault-tolerant control schemes.

Power Conversion (DC/AC, DC/DC)
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13since 2023
0.0%YoY
High-Density Magnetic Component Integration

Techniques for designing and manufacturing compact, multi-functional magnetic components, such as inductors, transformers, and coils, often involving embedded structures, multilayer designs, or shared magnetic circuits to achieve higher power density or smaller form factors.

Power Conversion (DC/AC, DC/DC)
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11since 2023
0.0%YoY
Multi-modal Sensor Fusion

Techniques for combining data from disparate sensor types (e.g., cameras, radar, mobile device signals) to achieve a more robust and comprehensive understanding of an environment or subject, often leveraging machine learning for interpretation and correlation.

Computer Vision
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11since 2023
0.0%YoY
Driver State Monitoring

Systems that monitor a vehicle operator's physiological state, attentiveness, or behavior using in-cabin sensors and machine learning to enhance safety or personalize vehicle functions.

Vehicle Control Systems
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10since 2023
+400.0%YoY
Motor System Integration & Safety

Integration of electric motors into larger systems (e.g., vehicles, power tools) and safety features for high-voltage components, including control interfaces, mechanical integration, and environmental protection (e.g., waterproofing).

Electric Motors & Generators
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10since 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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6since 2023
-75.0%YoY
Video Quality & Encoding Optimization

Methods and apparatus for improving the visual fidelity, resolution, or compression efficiency of video signals, often through advanced processing, up-scaling, or neural network-based filters.

Computer Vision
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5since 2023
-50.0%YoY
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 Conversion (DC/AC, DC/DC)
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4since 2023
+100.0%YoY
Specialized Neural Network Architectures

Development and optimization of novel neural network layers or architectures specifically designed to improve performance or efficiency for computer vision tasks.

Computer Vision
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4since 2023
-50.0%YoY
Automated Dependency Management

Techniques and tools for automatically identifying, resolving, building, and packaging software dependencies, including managing versions, branches, and ensuring the integrity and security of the dependency chain.

Software Development & Compilers
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3since 2023
+300.0%YoY
Access Control & Identity Management

Systems and methods for authenticating users, devices, or applications, authorizing their access to resources based on policies, and managing digital identities across various platforms.

Computer Security
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3since 2023
new
AI for Medical Diagnostics

Utilizing machine learning, particularly deep learning, to analyze medical data such as images, sensor readings, or physiological signals for disease prediction, diagnosis, or treatment assessment.

Computer Vision
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1since 2023
new
Secure Data Sharing & Rights Management

Mechanisms to facilitate the secure exchange of data between different entities or systems while enforcing usage policies, managing digital content rights, and ensuring data consistency during replication or transfer.

Computer Security
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1since 2023
new
Automated Fault Response

Involves systems designed to automatically detect errors or failures and initiate predefined or intelligent corrective actions, recovery procedures, or notifications to minimize downtime and manual intervention.

System Reliability & Diagnostics
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1since 2023
new
System Resource & Power Optimization

Methods and systems for efficiently allocating computing resources, balancing workloads, and managing power states to improve performance, reduce energy consumption, or enhance reliability in computing platforms.

Operating Systems & Program Control
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1since 2023
new
Virtualization & Secure Remote Access

Technologies enabling the creation and management of virtual computing environments, including virtual machines and virtual desktops, with an emphasis on secure and efficient remote access, updates, and performance.

Operating Systems & Program Control
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1since 2023
new

Patents

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