Ryuzo Sakakiyama

This inventor holds 53 USPTO granted patents, primarily in Vehicle Control Systems (CPC class 192-). Top assignees: Fuji Jukogyo Kabushiki Kaisha, Van Doorne's Transmissie B.v.. Active years: 1983-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryuzo Sakakiyama. Retrieved from https://idiyas.com/inventor/ryuzo-sakakiyama

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

USPTO Granted Patents = 53

% Patents Active = 96.2

Average Co-Inventor Count = 1.4

ph-index = 12

Forward Citations = 447(Granted Patents)

Forward Citations (Not Self Cited) = 408(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

54 out of 2,208

Fuji Jukogyo Kabushiki Kaisha

patents

3 out of 141

Van Doorne's Transmissie B.v.

patents

where one patent can have more than one assignee

Years Active: 1983-2004

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Areas of Expertise:

Automatic Transmission

Electromagnetic Clutch

Power Distribution

Clutch Control

Four-Wheel Drive

Hydraulic Control

Failure Detection

Torque Control

Driving Force Distribution

Control System

53 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6698541 - Driving force distributing apparatus for a vehicle (2004-03-02),

2. 6634451 - Power distribution control system for a vehicle (2003-10-21),

3. 6604595 - Driving force distributing apparatus for a vehicle (2003-08-12),

4. 6564139 - Apparatus and method for controlling a four-wheel drive vehicle (2003-05-13),

5. 5890991 - Control system and method of continuously variable transmission (1999-04-06),

6. 5655408 - Failure detecting system and method for automatic transmission (1997-08-12),

7. 5601510 - Failure detecting system and method for automatic transmission (1997-02-11),

8. 5591101 - Failure detecting system and method for automatic transmission (1997-01-07),

9. 5573475 - Failure detecting system and method for automatic transmission (1996-11-12),

10. 5486147 - Failure detecting system and method for automatic transmission (1996-01-23),

11. 4913270 - Control system for an automatic transmission of a motor vehicle with an (1990-04-03),

12. 4911275 - System for controlling a clutch for a vehicle (1990-03-27),

13. 4848544 - Control system for a clutch for a vehicle (1989-07-18),

14. 4848528 - Control system for an electromagnetic clutch for a vehicle (1989-07-18),

15. 4836322 - Power transmission system for a four-wheel drive vehicle (1989-06-06),

Title: The Innovative Journey of Ryuzo Sakakiyama

Introduction: Ryuzo Sakakiyama is a pioneering inventor hailing from Tokyo, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Ryuzo Sakakiyama holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Sakakiyama has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs. His innovative spirit and dedication to his craft have earned him recognition as a trailblazer in the industry.

Collaborations: Throughout his career, Ryuzo Sakakiyama has collaborated with top research institutions and universities in Japan, fostering a culture of innovation and knowledge-sharing. His collaborative efforts have resulted in the development of cutting-edge technologies that have the potential to shape the future of various industries.

Conclusion: Ryuzo Sakakiyama's relentless pursuit of innovation and his passion for creating technologies that make a difference have solidified his position as a visionary inventor in the realm of technology. His contributions 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]