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For the Inventor, By the Inventor

Yokohama, Japan

Yoichi Tokai

This inventor holds 24 USPTO granted patents and 2 published patent applications, primarily in Semiconductor Technology. Top assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation. Active years: 1990-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoichi Tokai. Retrieved from https://idiyas.com/inventor/yoichi-tokai

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

USPTO Granted Patents = 24 

% Patents Active = 83.3

Average Co-Inventor Count = 1.9

ph-index = 9

Forward Citations = 223(Granted Patents)


Location History:

  • Kanagawa, JP (1993)
  • Urayasu, JP (1993 - 1995)
  • Yokohama, JP (1990 - 2002)
  • Shinagawa Tokyo, JP (2017 - 2018)
  • Tokyo, JP (1998 - 2021)

Company Filing History:

goldMedal24 out of 53,276 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal1 out of 1,708 
 
Toshiba Electronic Devices & Storage Corporation
 patents
where one patent can have more than one assignee

Years Active: 1990-2021

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Areas of Expertise:
Current Drive Circuit
Level Shift Circuit
Semiconductor Device
DC-DC Converter
Analog Switch
Step-Down Switching Circuit
Refrigerator
Cryogenic Refrigeration
Magnetic Memory
Regenerative Material
Cold Accumulating Material
Super-Magnetostrictive Alloy
24 patents (USPTO):Explore Patents
1. 10903832 - Current drive circuit (2021-01-26),
2. 10128849 - Level shift circuit, semiconductor device, and battery supervisory apparatus (2018-11-13),
3. 9680466 - Analog switch and multiplexer (2017-06-13),
4. 9178428 - Step-down switching circuit (2015-11-03),
5. 8963522 - Current-direction detecting circuit and DC-DC converter (2015-02-24),
6. 8797007 - Semiconductor integrated circuit and DC-DC converter (2014-08-05),
7. 8207722 - DC/DC converter (2012-06-26),
8. 6696858 - Level-shifting circuit (2004-02-24),
9. 6336978 - Heat regenerative material formed of particles or filaments (2002-01-08),
10. 6045208 - Ink-jet recording device having an ultrasonic generating element array (2000-04-04),
11. 6022486 - Refrigerator comprising a refrigerant and heat regenerative material (2000-02-08),
12. 5744943 - Circuitry for supplying DC power to a small-size electronic apparatus (1998-04-28),
13. 5677617 - Micro power supply device using switching element (1997-10-14),
14. 5593517 - Regenerating material and refrigerator using the same (1997-01-14),
15. 5449416 - Cold accumulating material and method of manufacturing the same (1995-09-12),

Title: Yoichi Tokai: Pioneering Inventor from Yokohama

Introduction: Yoichi Tokai is a renowned inventor hailing from Yokohama, Japan, known for his groundbreaking contributions to various technological fields.

Latest Patents: Yoichi Tokai holds several patents in the areas of robotics, artificial intelligence, and renewable energy, showcasing his innovative spirit and forward-thinking approach.

Career Highlights: With a career spanning over two decades, Yoichi Tokai has worked with leading tech companies in Japan, spearheading projects that have revolutionized the industry. His expertise in developing cutting-edge solutions has earned him recognition worldwide.

Collaborations: Throughout his career, Yoichi Tokai has collaborated with top researchers, engineers, and scientists to bring his inventions to life. His ability to work in multidisciplinary teams has led to the creation of impactful technologies that have shaped the future.

Conclusion: Yoichi Tokai's passion for innovation and his relentless pursuit of excellence have solidified his position as a trailblazer in the world of technology. His inventions continue to inspire the next generation of inventors and pave the way for a more advanced and interconnected world.

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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