Company patents
Hitachi Industrial Equipment Systems Co., Ltd.
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO. LTD. shows a surprising shift in its patent strategy, with a strong historical focus on Motor Control (16.7% of portfolio) and Pumps (Positive Displacement) (15.4%), both of which saw significant growth in 2024 (Motor Control +50.0%, Pumps +66.7%), but have experienced sharp declines in 2025 and so far in 2026. This suggests a potential re-evaluation of core industrial equipment areas, while categories like Industrial Control Systems, which saw an 800.0% YoY growth in 2024, also experienced a significant decline in 2025, indicating a dynamic and possibly volatile patenting landscape for the company.
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.
227 US filings (since 2023) · 12 categories · 29 themes
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.
Design and engineering solutions for creating self-contained, mobile, or miniaturized pump systems, often incorporating battery power, ergonomic features, and integrated components for ease of use and transport.
Systems and components for storing, delivering, circulating, and managing printing liquids (e.g., ink) to the printhead, often including features for pressure regulation, filtration, degassing, and balancing liquid levels.
Mechanisms and methods for preventing or removing clogs, ink residue, or contaminants from printhead nozzles and surfaces to ensure consistent print quality and extend printhead lifespan.
Techniques and systems for optimizing pump operation, including capacity modulation, energy management, pulsation reduction, and precise fluid dispensing to improve performance and reduce energy consumption.
Systems and methods for monitoring, regulating, and diagnosing the performance and health of pumps and fans, including speed control, flow rate management, abnormality detection, and safety mechanisms like overspeed safeguards.
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.
Methods and components for converting power into mechanical motion to drive pump mechanisms, encompassing electric motors, hydraulic actuators, and specialized motion converters like ball screws or solenoids.
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.
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.
Innovations in the design and arrangement of piezoelectric or thermal actuators, drive electronics, and fluidic structures within the printhead to achieve precise and efficient liquid ejection.
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.
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.
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.
Technologies for precisely controlling the timing and volume of liquid droplet ejection, and for real-time or post-ejection monitoring of droplet trajectory, velocity, and nozzle health to maintain print accuracy and quality.
Design aspects of user-replaceable cartridges or containers for printing consumables (e.g., ink, tape, labels) that facilitate easy installation, proper positioning, type identification, and reliable supply to the printer.
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.
Innovations in the design, materials, and maintenance of seals, valves, and related components to improve durability, reduce leakage, and enable specific pump functions like high-pressure operation or automated seal replacement.
Pumps and blowers specifically adapted or designed for unique fluid types, challenging environments, or particular industrial, medical, or consumer applications, often involving debris, specific gas mixtures, or precise delivery requirements.
Techniques for monitoring system components and behaviors to anticipate failures, performance degradation, or anomalies, often leveraging machine learning for pattern recognition and forecasting.
Technologies focused on improving indoor air quality by removing pollutants, microorganisms, or excess humidity, often employing specialized materials, filtration, or air circulation strategies.
Devices and methods for accurately measuring or monitoring electrical current draw and power usage in various systems, often for control, optimization, or safety purposes.
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).
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.
Utilizing sensor data, historical performance, and analytical models to anticipate equipment failures, diagnose faults, and estimate remaining useful life, thereby enabling proactive maintenance and reducing downtime.
Systems and components designed for precise, automated manipulation, transfer, and dispensing of liquid samples and reagents, often involving pipettes, robotic arms, and specialized sample containers.
Apparatus and methods for precisely controlling temperature profiles (heating, cooling, incubation) within laboratory reaction vessels or modules to optimize biochemical processes like gene amplification or protein assays.
Novel formulations and mechanisms for initiating or controlling the polymerization and cross-linking of adhesives, including dual-curing systems, radical polymerization, and partial curing for tailored material properties.
Engineering and diagnostic aspects of individual heating, ventilation, and air conditioning components, such as PTC heaters, air ducts, flow control valves, and compressor monitoring.
Patents
Showing 1-10 of 381