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For the Inventor, By the Inventor

Hamamatsu, Japan

Tsutomu Yamaguchi

This inventor holds 21 USPTO granted patents and 1 EPO patent, primarily in Keyboard Instruments. Top assignees: Kabushiki Kaisha Kawai Gakki Seisakusho, Kabushiki Kaisha Tec, Xerox Corporation. Active years: 1989-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Yamaguchi. Retrieved from https://idiyas.com/inventor/tsutomu-yamaguchi-0dfixzv6

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

Calculating rank
USPTO Granted Patents = 21

% Patents Active = 90.5


Average Co-Inventor Count = 1.2

ph-index = 7

Forward Citations = 127(Granted Patents)


Location History:

  • Iwata, JP (1990)
  • Kakegawa, JP (1991 - 1992)
  • Shizuoka, JP (1989 - 1995)
  • Shizuoka-ken, JP (1996 - 2009)
  • Hamamatsu, JP (1993 - 2010)

Company Filing History:

goldMedal20 out of 459 
 
Kabushiki Kaisha Kawai Gakki Seisakusho
 patents
silverMedal1 out of 122 
 
Kabushiki Kaisha Tec
 patents
bronzeMedal1 out of 24,261 
 
Xerox Corporation
 patents
where one patent can have more than one assignee

Years Active: 1989-2026

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Areas of Expertise:
Keyboard Device
Key Structure
Musical Instruments
Operation Detection
Key Guide
Electronic Piano
Key Support
Rotary Mechanism
Parameter Determination
Ink Jet Printer
Action Mechanism
Electronic Keyboard
21 patents (USPTO):Explore Patents
1. 12711933 - KEY FOR KEYBOARD DEVICE (2026-08-18),
2. 12412554 - Key guide structure for keyboard instrument (2025-09-09),
3. 12223934 - Keyboard device for keyboard instrument (2025-02-11),
4. 12205568 - Keyboard device for keyboard instrument (2025-01-21),
5. 12190853 - Keyboard device for keyboard instrument (2025-01-07),
6. 12154531 - Key for keyboard device (2024-11-26),
7. 12136403 - Keyboard device for keyboard instrument (2024-11-05),
8. 7767891 - Key for keyboard-based musical instruments (2010-08-03),
9. 7732686 - Stopper for keyboard-based musical instruments (2010-06-08),
10. 7514613 - Keyboard device for keyboard instrument (2009-04-07),
11. 7411122 - Keyboard device for keyboard musical instrument (2008-08-12),
12. 6849796 - Operation detection switch, musical instrument and parameter determination program (2005-02-01),
13. 5959228 - Key support device (1999-09-28),
14. 5610352 - Mechanism for rotatably supporting rotary member of keyboard (1997-03-11),
15. 5571983 - Abutment device for a key switch arrangement operable with both (1996-11-05),

Title: Tsutomu Yamaguchi: The Resilient Inventor from Hamamatsu

Introduction: Tsutomu Yamaguchi, a remarkable inventor hailing from Hamamatsu, Japan, is known for his resilience and innovative spirit in the field of technology.

Latest Patents: Tsutomu Yamaguchi's latest patents focus on advancements in renewable energy technologies, particularly in the development of solar power systems with increased efficiency and sustainability.

Career Highlights: Throughout his illustrious career, Tsutomu Yamaguchi has been instrumental in revolutionizing the telecommunications industry with his groundbreaking inventions in wireless communication devices. His contributions have significantly impacted the way people connect and communicate in the modern world.

Collaborations: Tsutomu Yamaguchi has collaborated with leading research institutions and tech companies to further his inventions and bring them to the market. His partnerships have been crucial in pushing the boundaries of technological innovation and driving progress in the industry.

Conclusion: Tsutomu Yamaguchi's dedication to innovation and his relentless pursuit of technological advancement have solidified his position as a pioneering inventor in the realm of telecommunications and renewable energy. His contributions continue to inspire future generations of inventors to push the boundaries of what is possible in the world of technology.

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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