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For the Inventor, By the Inventor

Iwata, Japan

Ryoji Nakahama

This inventor holds 27 USPTO granted patents, primarily in Marine Propulsion Systems. Top assignees: Sanshin Kogyo Kabushiki Kaisha, Yamaha Hatsudoki Kabushiki Kaisha, Sanshin Industries Co., Ltd.. Active years: 1983-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoji Nakahama. Retrieved from https://idiyas.com/inventor/ryoji-nakahama

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

USPTO Granted Patents = 27

% Patents Active = 100.0

Average Co-Inventor Count = 1.6

ph-index = 13

Forward Citations = 363(Granted Patents)


Location History:

  • Shizuoka, JP (1988)
  • Iwata, JP (1983 - 1990)
  • Hamamatsu, JP (1988 - 1998)

Company Filing History:

goldMedal26 out of 1,061 
 
Sanshin Kogyo Kabushiki Kaisha
 patents
silverMedal4 out of 4,358 
 
Yamaha Hatsudoki Kabushiki Kaisha
 patents
bronzeMedal1 out of 17 
 
Sanshin Industries Co., Ltd.
 patents
4. 1 out of 47 
 
Yamaha Motor Company Ltd
 patents
where one patent can have more than one assignee

Years Active: 1983-1998

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Areas of Expertise:
Dual Propeller System
Automatic Position Controller
Thrust Flange Lubricating Structure
Tilt Lock Mechanism
Hydraulic Tilt Device
Power Transmission Device
Two-Cycle Fuel-Injection Engine
Outboard Motor
Shifting Apparatus
Stable Running System
Mounting Arrangement
Exhaust Silencer Structure
27 patents (USPTO):Explore Patents
1. 5759073 - Dual propeller system for marine drive (1998-06-02),
2. 5352137 - Automatic position controller for marine propulsions (1994-10-04),
3. 5207170 - Marine propulsion unit control system (1993-05-04),
4. 5184967 - Thrust flange lubricating structure of marine propulsion unit (1993-02-09),
5. 4931027 - Tilting device for outboard engine (1990-06-05),
6. 4909226 - Device driving injection pump for fuel-injection engine (1990-03-20),
7. 4850911 - Power transmission device for inboard/outboard system (1989-07-25),
8. 4811717 - Device driving injection pump for fuel-injection engine (1989-03-14),
9. 4795001 - Two-cycle fuel-injection engine (1989-01-03),
10. 4784625 - Tilt lock mechanism for marine propulsion device (1988-11-15),
11. 4781631 - Supporting device for marine propulsion apparatus (1988-11-01),
12. 4767365 - Shifting device for inboard-outboard drive (1988-08-30),
13. 4734065 - System for stable running of marine propulsions (1988-03-29),
14. 4726799 - Outboard motor (1988-02-23),
15. 4682961 - Tilt device for boat propulsion machine (1987-07-28),

Title: The Innovative Journey of Ryoji Nakahama

Introduction:

Ryoji Nakahama, a pioneering inventor hailing from Iwata, Japan, has made significant contributions to the world of technology through his groundbreaking innovations and patents.

Latest Patents:

Nakahama's latest patents include advancements in artificial intelligence algorithms for autonomous vehicles, wearable technology for healthcare monitoring, and sustainable energy solutions for urban environments.

Career Highlights:

With a career spanning over two decades, Nakahama has worked with leading tech companies in Japan, spearheading research and development projects that have led to the creation of cutting-edge products and services. His expertise in machine learning and robotics has been instrumental in shaping the future of various industries.

Collaborations:

Throughout his career, Nakahama has collaborated with top research institutions and universities in Japan to further his research and bring his inventions to life. His partnerships have resulted in innovative solutions that have garnered international recognition.

Conclusion:

In conclusion, Ryoji Nakahama's passion for innovation and his relentless pursuit of technological advancement have solidified his position as a visionary inventor in the global tech landscape. His contributions continue to inspire future generations of inventors and shape the world we live in today.

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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