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For the Inventor, By the Inventor

Chiba, Japan

Kazuo Kato

This inventor holds 51 USPTO granted patents and 2 published patent applications, primarily in Electronic Timepieces (CPC class G04G). Top assignees: Seiko Instruments Inc, Asahi Glass Company, Limited, Nippon Steel Corporation. Active years: 1994-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuo Kato. Retrieved from https://idiyas.com/inventor/kazuo-kato-wkgffzao

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

Calculating rank
USPTO Granted Patents = 51 

% Patents Active = 64.7

Average Co-Inventor Count = 2.4

ph-index = 11

Forward Citations = 317(Granted Patents)

Forward Citations (Not Self Cited) = 311(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Yokohama, JP (1994 - 1997)
  • Kita-ku, Kobe, Hyogo JP (1998)
  • Ichihara, JP (2003 - 2004)
  • Chiba, JP (1998 - 2022)

Company Filing History:

goldMedal38 out of 2,903 
 
Seiko Instruments Inc
 patents
silverMedal5 out of 2,560 
 
Asahi Glass Company, Limited
 patents
bronzeMedal4 out of 3,724 
 
Nippon Steel Corporation
 patents
4. 3 out of 5 
 
System Uniques Corporation
 patents
5. 1 out of 3 
 
Seiko Watch Kabushiki Kaisha (Trading as Seiko Watch Corporation)
 patents
6. 1 out of 1 
 
Systems Uniques Corporation
 patent
7. 3 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 1994-2025

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Areas of Expertise:
Stepping Motor Control
Electronic Timepiece
Measurement Data Processing
Chronograph
Heartbeat Measuring Device
Ultraviolet Ray Measuring Apparatus
Electronic Device
Power Supply Unit
Display Device
Electronic Compass
Pedometer
Tetrafluoroethylene Polymer
51 patents (USPTO):Explore Patents
1. 12346068 - Stepping motor control device, movement, timepiece, and stepping motor control method (2025-07-01),
2. 11237524 - Timepiece, electronic device, and method of determining illuminance of timepiece (2022-02-01),
3. 10754300 - Timepiece and control method of timepiece (2020-08-25),
4. 10132627 - Electronic device, measurement data processing method, and measurement data processing program (2018-11-20),
5. 9092015 - Electronic timepiece (2015-07-28),
6. 9076371 - Display device and electronic apparatus using display device (2015-07-07),
7. 9036455 - Electronic timepiece (2015-05-19),
8. 8982675 - Power supply unit and electronic timepiece (2015-03-17),
9. 8682420 - Heartbeat measuring device and heartbeat measuring method (2014-03-25),
10. 8586938 - Ultraviolet ray measuring apparatus and electronic wristwatch equipped with ultraviolet ray measuring function (2013-11-19),
11. 8406086 - Electronic timepiece (2013-03-26),
12. 8351303 - Stepping motor controller and analog electronic timepiece (2013-01-08),
13. 8335135 - Stepping motor control circuit and analogue electronic timepiece (2012-12-18),
14. 8319468 - Stepping motor control circuit and analogue electronic timepiece (2012-11-27),
15. 8295131 - Chronograph timepiece (2012-10-23),

Title: Innovator Profile: Kazuo Kato - A Trailblazer in Timekeeping Technology

Introduction: Kazuo Kato is a prominent inventor hailing from Chiba, Japan, whose contributions to the field of timekeeping have significantly advanced modern technology. With an impressive portfolio of 50 patents, Kato has been at the forefront of innovation, developing devices that blend functionality with cutting-edge technology.

Latest Patents: Kato's recent patents showcase his expertise in creating advanced timepieces and electronic devices. One of his notable inventions is a timepiece equipped with a solar cell, which incorporates a solar panel and a secondary battery. This invention includes an overcharge prevention circuit that monitors the battery's state and a control unit that assesses light conditions to ensure optimal performance. Another significant patent involves a timepiece and its control method, where an indicating hand is driven by a motor that requires high-speed processing. This design notably features a main control circuit that manages motor timing and a motor control unit that generates necessary pulses for efficient operation.

Career Highlights: Throughout his career, Kazuo Kato has worked with reputable companies, notably Seiko Instruments Inc. and Asahi Glass Company, Limited. His experience in these organizations has allowed him to refine his skills and contribute to the development of innovative timekeeping technologies that are now used globally.

Collaborations: Kato has collaborated with notable coworkers, including Takanori Hasegawa and Akira Takakura. Together, they have fostered an environment of creativity and innovation, allowing for the realization of groundbreaking technologies in their field.

Conclusion: Kazuo Kato's journey as an inventor exemplifies the spirit of innovation in the realm of timekeeping technology. His impressive array of patents and collaborations with industry leaders highlight his significance in advancing electronic devices. As technology continues to evolve, Kato's contributions will undoubtedly leave a lasting impact on the world of timepieces.

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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