Hiroya Ohkumo

This inventor holds 32 USPTO granted patents, primarily in Automotive Control Systems. Top assignees: Fuji Jukogyo Kabushiki Kaisha, Hitachi, Ltd.. Active years: 1986-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroya Ohkumo. Retrieved from https://idiyas.com/inventor/hiroya-ohkumo

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

USPTO Granted Patents = 32

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 8

Forward Citations = 222(Granted Patents)

Location History:

Koganei, JP (1986 - 1990)
Kaisha, JP (1990)
Musashino, JP (1991)
Tokyo, JP (1989 - 1993)

Company Filing History:

32 out of 2,208

Fuji Jukogyo Kabushiki Kaisha

where one patent can have more than one assignee

Years Active: 1986-1993

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Areas of Expertise:

Ignition Timing

Idle Speed Control

Clutch Control

Fuel Supply

Trouble Detection

Air Conditioning

Transmission Ratio

Continuously Variable

Automotive Engine

Control Method

Electromagnetic Clutch

32 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5267544 - Crank angle and cylinder number detecting system and method for internal (1993-12-07),

2. 5076230 - Idle speed control system for an engine (1991-12-31),

3. 5056326 - Apparatus for controlling air conditioning unit for automotive vehicle (1991-10-15),

4. 5038736 - Method for controlling ignition timing of an internal combustion engine (1991-08-13),

5. 5035219 - Method for controlling ignition timing of an internal combustion engine (1991-07-30),

6. 5016590 - System for controlling ignition timing of an internal combustion engine (1991-05-21),

7. 5002026 - Engine idle speed control apparatus (1991-03-26),

8. 5000150 - Method for controlling ignition timing of an internal combustion engine (1991-03-19),

9. 4989562 - Trouble detector system for an intake system of an automotive engine (1991-02-05),

10. 4976139 - Trouble detector system for an intake system of an automotive engine (1990-12-11),

11. 4911275 - System for controlling a clutch for a vehicle (1990-03-27),

12. 4903658 - Control method for idling speed of an engine (1990-02-27),

13. 4903526 - Trouble detector system for an intake system of an automotive engine (1990-02-27),

14. 4880094 - Control system for a clutch for a vehicle (1989-11-14),

15. 4848544 - Control system for a clutch for a vehicle (1989-07-18),

Title: Unveiling the Innovations of Hiroya Ohkumo

Introduction:

Hiroya Ohkumo, a prolific inventor hailing from Tokyo, Japan, has made significant contributions to the field of engine technology. With a remarkable portfolio of 32 patents, Ohkumo's inventive spirit and technological prowess have left a lasting impact on the industry.

Latest Patents:

Among his recent patents is the 'Crank Angle and Cylinder Number Detecting System and Method for Internal Combustion Engines'. This innovative system utilizes a disc secured to the camshaft of the engine, equipped with projections that, when detected by a sensor, allow for precise determination of the engine's crank angle and cylinder number in a short span of time. Another notable invention is the 'Idle Speed Control System for Engines', which features a feedback control mechanism that ensures optimal engine idling speed through a wide and narrow dead zone comparison.

Career Highlights:

Hiroya Ohkumo's expertise and ingenuity have been honed through his tenure at distinguished companies such as Fuji Heavy Industries Ltd. and Hitachi, Ltd. (formerly Hitachi, Ltd.). His professional journey has been marked by a relentless pursuit of innovation and excellence in the realm of automotive engineering.

Collaborations:

Throughout his career, Ohkumo has collaborated with esteemed colleagues such as Shuji Miyama and Ryuzo Sakakiyama, who have played instrumental roles in bringing his visionary inventions to fruition. Their collective efforts have underscored the importance of teamwork and shared innovation in driving technological advancements.

Conclusion:

In conclusion, Hiroya Ohkumo stands as a beacon of creativity and technical expertise in the realm of engine innovation. His relentless dedication to pushing the boundaries of technological advancement continues to inspire generations of inventors and engineers worldwide, solidifying his legacy as a trailblazer in the field.

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]