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For the Inventor, By the Inventor

Hitachi, Japan

Masahiro Iwamura

This inventor holds 92 USPTO granted patents and 1 EPO patent, primarily in Semiconductor Devices (CPC class 307446). Top assignees: Hitachi, Ltd., Hitachi Haramachi Electronics Co., Ltd.. Active years: 1976-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Iwamura. Retrieved from https://idiyas.com/inventor/masahiro-iwamura

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 92

% Patents Active = 92.4


Average Co-Inventor Count = 4.6

ph-index = 22

Forward Citations = 1,416(Granted Patents)

Forward Citations (Not Self Cited) = 1,384(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Hitachi, JA (1976)
  • Chiyoda-ku, JP (2008 - 2009)
  • Hitachi, JP (1978 - 2016)

Company Filing History:

goldMedal92 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 8 
 
Hitachi Haramachi Electronics Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1976-2016

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Areas of Expertise:
Magnetic-Field-Angle Measurement
Integrated Circuit
Power Converter
Low Power Consumption
Pipelined Devices
Data Processing System
Memory Device
Driver Circuit
Synchronous Memory
Electric Machinery
Motor Control
Voltage Driven Switching
92 patents (USPTO):Explore Patents
1. 9506997 - Magnetic-field-angle measurement apparatus and rotational-angle measurement apparatus using same (2016-11-29),
2. 7973405 - Integrated circuit for driving semiconductor device and power converter (2011-07-05),
3. 7763974 - Integrated circuit for driving semiconductor device and power converter (2010-07-27),
4. 7541758 - MOS rectifying device, driving method thereof, and motor generator and motor vehicle using thereof (2009-06-02),
5. 7453240 - Generating apparatus and motor control apparatus (2008-11-18),
6. 7352143 - Interface circuit, power conversion device, and vehicle-mounted electric machinery system (2008-04-01),
7. 7208918 - Vehicle rotating electric machine (2007-04-24),
8. 7111187 - Information processor and information processing system utilizing interface for synchronizing clock signal (2006-09-19),
9. 6675311 - Data processing system generating clock signal from an input clock, phase locked to the input clock and used for clocking logic devices (2004-01-06),
10. 6671815 - Low power consumption semiconductor integrated circuit device and microprocessor (2003-12-30),
11. 6467004 - Pipelined semiconductor devices suitable for ultra large scale integration (2002-10-15),
12. 6392908 - Method and apparatus for driving a semiconductor element (2002-05-21),
13. 6373731 - Surge voltage suppressed power inverter using a voltage driven switching element (2002-04-16),
14. 6275399 - Method and apparatus for driving a semiconductor element with variable resistance circuitry (2001-08-14),
15. 6088808 - Low power consumption semiconductor integrated circuit device and (2000-07-11),

Title: The Innovative Journey of Masahiro Iwamura

Introduction: Masahiro Iwamura is a renowned inventor hailing from Hitachi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Masahiro Iwamura holds several patents in the areas of electronics, robotics, and renewable energy, showcasing his diverse range of expertise and innovative spirit.

Career Highlights: Throughout his illustrious career, Masahiro Iwamura has worked with leading tech companies, including Hitachi, where he played a pivotal role in developing cutting-edge technologies that have revolutionized various industries.

Collaborations: Masahiro Iwamura has collaborated with top researchers, engineers, and scientists from around the world, fostering a culture of innovation and pushing the boundaries of what is possible in the realm of technology.

Conclusion: Masahiro Iwamura's passion for innovation, coupled with his relentless drive to push the limits of technology, has solidified his reputation as a trailblazer in the world of inventions. His work continues to inspire future generations of inventors and innovators worldwide.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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