Tatsuhisa Yokoi

This inventor holds 17 USPTO granted patents and 1 published patent application and 9 EPO patents. Top assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation, Kabushiki Kaisha Toyoda Jidoshokki Seisakusho. Active years: 1987-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsuhisa Yokoi. Retrieved from https://idiyas.com/inventor/tatsuhisa-yokoi

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

USPTO Granted Patents = 17 (Patent Applications = 1)

% Patents Active = 35.3

EPO Patents = 9 (Patent Applications = 10)

Average Co-Inventor Count = 4.2

ph-index = 5

Forward Citations = 88(Granted Patents)

Company Filing History:

16 out of 38,912

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

patents

4. 2 out of 1,902

Kabushiki Kaisha Toyota Jidoshokki

patents

where one patent can have more than one assignee

Years Active: 1987-2020

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10569852 - Ship propulsion unit (2020-02-25),

2. 8087233 - Vehicle diesel engine and control method of the same (2012-01-03),

3. 7895830 - Exhaust gas purification system for internal combustion engine and exhaust gas purification method therefor (2011-03-01),

4. 7849677 - Regeneration controller for exhaust purification apparatus of internal combustion engine (2010-12-14),

5. 7841169 - Regeneration controller for exhaust purification apparatus of internal combustion engine (2010-11-30),

6. 7836685 - Regeneration controller for exhaust purification apparatus of internal combustion engine (2010-11-23),

7. 7739904 - Abnormality detection apparatus and method for oil level sensor (2010-06-22),

8. 7677029 - Regeneration controller for exhaust purification apparatus of internal combustion engine (2010-03-16),

9. 7607290 - Exhaust purifying apparatus for internal combustion engine (2009-10-27),

10. 7600373 - Regeneration controller for exhaust purification apparatus of internal combustion engine (2009-10-13),

11. 7484359 - Exhaust purifying apparatus for internal combustion engine (2009-02-03),

12. 7451748 - EGR cooler system (2008-11-18),

13. 7340884 - Exhaust purifying apparatus and exhaust purifying method for internal combustion engine (2008-03-11),

14. 7185488 - Exhaust purifying apparatus and exhaust purifying method for internal combustion engine (2007-03-06),

15. 4723529 - Oil separator for a blowby gas ventilation system of an internal (1988-02-09),

Title: Innovations of Tatsuhisa Yokoi

Introduction

Tatsuhisa Yokoi is a prominent inventor based in Toyota, Japan. He holds a total of 17 patents, showcasing his significant contributions to the field of engineering and technology. His work primarily focuses on advancements in ship propulsion and diesel engine technology.

Latest Patents

One of his latest innovations is a ship propulsion unit. This unit includes an engine with a crankshaft extending in the front-rear direction of a ship, a propeller shaft, and a power transmission mechanism that couples the crankshaft and the propeller shaft. The design features an upper case and a lower case that accommodates the propeller shaft, with a rotation mechanism allowing the lower case to rotate around the axis of the drive shaft.

Another notable patent is related to a vehicle diesel engine and its control method. This diesel engine incorporates a PM filter in its exhaust passage and a fuel injection valve that performs post fuel injection in addition to primary fuel injection. This innovation helps maintain the purification performance of the PM filter. Additionally, it includes an oil level sensor that detects the degree of dilution of engine oil, along with an indicator lamp that signals when the engine oil needs changing.

Career Highlights

Tatsuhisa Yokoi has worked with notable companies such as Toyota Motor Corporation and Denso Corporation. His experience in these leading automotive firms has significantly influenced his innovative capabilities and contributions to the industry.

Collaborations

Throughout his career, Yokoi has collaborated with esteemed colleagues, including Shigehiro Matsuno and Yasuhiko Otsubo. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Tatsuhisa Yokoi's contributions to engineering, particularly in ship propulsion and diesel engine technology, highlight his innovative spirit and dedication to advancing the field. His patents reflect a commitment to improving performance and efficiency in automotive engineering.

Profile summary based on public USPTO records.