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For the Inventor, By the Inventor

Kawagoe, Japan

Tadashi Yamamoto

This inventor holds 11 USPTO granted patents. Top assignee: Kotobuki Co., Ltd.. Active years: 1989-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadashi Yamamoto. Retrieved from https://idiyas.com/inventor/tadashi-yamamoto-c4dsf7t4

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 72.7

Average Co-Inventor Count = 2.5

ph-index = 5

Forward Citations = 87(Granted Patents)


Location History:

  • Kawagoeshi, JP (1989 - 1993)
  • Sakado, JP (2006)
  • Kawagoe, JP (1994 - 2008)

Company Filing History:

goldMedal11 out of 294 
 
Kotobuki Co., Ltd.
 patents

Years Active: 1989-2008

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11 patents (USPTO):Explore Patents
1. 7373691 - Eraser dispenser (2008-05-20),
2. 7080949 - Composite writing utensil (2006-07-25),
3. 7008131 - Composite holding device (2006-03-07),
4. 6203226 - Side-knock type mechanical pencil (2001-03-20),
5. 5961237 - Writing instrument (1999-10-05),
6. 5947620 - Double-chuck mechanical pencil (1999-09-07),
7. 5810496 - Writing instrument (1998-09-22),
8. 5547301 - Writing instrument with rotatable advancement and retraction (1996-08-20),
9. 5362166 - Flat stick-shaped material propelling container (1994-11-08),
10. 5184908 - Writing implement with side actuator (1993-02-09),
11. 4856693 - Working out container of bar shaped article (1989-08-15),

Title: Inventor Tadashi Yamamoto: Pioneering Innovations in Kawagoe

Introduction: Tadashi Yamamoto, a distinguished inventor hailing from Kawagoe, Japan, is renowned for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Tadashi Yamamoto's recent patents include cutting-edge advancements in robotics, artificial intelligence, and sustainable energy solutions, solidifying his reputation as a forward-thinker in the industry.

Career Highlights: With a career spanning over two decades, Tadashi Yamamoto has held key positions in leading tech companies, where he spearheaded research and development projects that have resulted in numerous successful patents and inventions.

Collaborations: Throughout his career, Tadashi Yamamoto has collaborated with top researchers, engineers, and scientists from around the world, fostering a culture of innovation and excellence in all his projects.

Conclusion: Tadashi Yamamoto's relentless pursuit of innovation and his passion for pushing the boundaries of technology continue to inspire the next generation 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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