IDiyas

For the Inventor, By the Inventor

Katsuta, Japan

Keiichi Tokuyama

USPTO Granted Patents = 11

Average Co-Inventor Count = 4.1

ph-index = 9

Forward Citations = 175(Granted Patents)


Company Filing History:

goldMedal11 out of 42,485 
 
Hitachi, Ltd.
 patents

Years Active: 1983-1991

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11 patents (USPTO):Explore Patents
1. 5031479 - Automatic gear change control apparatus for automobile and method of (1991-07-16),
2. 4752771 - Electronic instrument panel (1988-06-21),
3. 4736198 - Multi-color liquid crystal display system (1988-04-05),
4. 4708440 - Liquid crystal display device (1987-11-24),
5. 4700303 - Height adjusting apparatus for motor vehicle (1987-10-13),
6. 4649381 - Liquid crystal panel display device (1987-03-10),
7. 4635034 - Display apparatus for vehicle (1987-01-06),
8. 4630840 - Vehicle height adjusting device (1986-12-23),
9. 4564905 - Trip computer for vehicles (1986-01-14),
10. 4553196 - Power source system for vehicular electronic device (1985-11-12),
11. 4398260 - Skid control method (1983-08-09),

Title: Keiichi Tokuyama: Innovator in Automotive Technology and Display Systems

Introduction

Keiichi Tokuyama is a prominent inventor based in Katsuta, Japan, known for his significant contributions to automotive technology and electronic display systems. With a total of 11 patents to his name, Tokuyama has made remarkable advancements that enhance the functionality and efficiency of vehicles and electronic instruments.

Latest Patents

Among his latest patents is the "Automatic gear change control apparatus for automobile and method of." This invention discloses an innovative system for controlling automatic gear changes in vehicles. It involves a rotational output of an internal combustion engine connected to the drive wheels and a load device. When a gear shift is required, the load applied by the load device is increased, or it is connected to the output rotation shaft of the engine through a selectively-connecting device. This process effectively reduces the rotational speed of the engine's output shaft to the necessary level.

Another notable patent is the "Electronic instrument panel." This invention features a color liquid crystal type electronic instrument panel that adjusts the quantity of light radiated from a background light source based on the displayed color. The design incorporates multiple primary-color stripe filters on each segment of the display element. A voltage is applied to the electrodes corresponding to the selected color, while a brightness detection device further enhances the display by adjusting the background light according to outdoor light conditions.

Career Highlights

Keiichi Tokuyama is currently employed at Hitachi, Ltd., where he continues to innovate and develop cutting-edge technologies. His work has significantly impacted the automotive and electronics industries, showcasing his expertise and commitment to advancing technology.

Collaborations

Throughout his career, Tokuyama has collaborated with notable colleagues, including Mitsuhiro Masuda and Osamu Igarashi. These partnerships have fostered a creative environment that encourages the development of groundbreaking inventions.

Conclusion

Keiichi Tokuyama's contributions to automotive technology and electronic displays exemplify his innovative spirit and dedication to improving everyday technology. His patents reflect a deep understanding of engineering principles and a commitment to enhancing user experience in both vehicles and electronic devices.

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