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For the Inventor, By the Inventor

Naka, Japan

Ryouta Doi

This inventor holds 10 USPTO granted patents and 1 EPO patent. Top assignees: Hitachi, Ltd., Honda Motor Co., Ltd., Other. Active years: 1985-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryouta Doi. Retrieved from https://idiyas.com/inventor/ryouta-doi

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

USPTO Granted Patents = 10

% Patents Active = 80.0


Average Co-Inventor Count = 7.3

ph-index = 6

Forward Citations = 140(Granted Patents)


Location History:

  • Ibaraki, JP (1985)
  • Naka-machi, JP (1999 - 2003)
  • Naka, JP (1986 - 2004)
  • Naka-gun, JP (2006)

Company Filing History:

goldMedal9 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 22,006 
 
Honda Motor Co., Ltd.
 patents
bronzeMedal1 out of 834,453 
Other
 patents
where one patent can have more than one assignee

Years Active: 1985-2006

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10 patents (USPTO):Explore Patents
1. 7093432 - Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine (2006-08-22),
2. 6823659 - Moisture removal device and method thereof for internal combustion engine use exhaust gas cleaning device (2004-11-30),
3. 6596247 - Method for purifying exhaust gas from internal combustion engines (2003-07-22),
4. 6397582 - Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine (2002-06-04),
5. 6272848 - Exhaust gas cleaning apparatus and method for internal combustion engine (2001-08-14),
6. 6161378 - Exhaust gas purification apparatus of internal combustion engine and (2000-12-19),
7. 5972828 - Method of manufacturing catalyst for cleaning exhaust gas released from (1999-10-26),
8. 5968870 - Catalyst for purifying exhaust gas from internal combustion engine and (1999-10-19),
9. 4612261 - Fuel cell battery using acidic electrolyte (1986-09-16),
10. 4562123 - Liquid fuel cell (1985-12-31),

Title: Ryouta Doi - Innovative Inventor from Naka-machi, JP

Introduction: Ryouta Doi is a talented inventor hailing from Naka-machi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Ryouta Doi has recently been granted patents for his cutting-edge inventions in the areas of robotics, artificial intelligence, and sustainable energy solutions.

Career Highlights: With a career spanning over two decades, Ryouta Doi has worked with leading tech companies and research institutions, consistently pushing the boundaries of what is possible in the world of invention.

Collaborations: Throughout his career, Ryouta Doi has collaborated with top engineers, scientists, and designers, fostering a culture of creativity and innovation that has led to numerous successful projects and patents.

Conclusion: Ryouta Doi's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors and shape the future of technology in Japan and beyond.

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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