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For the Inventor, By the Inventor

Ibaraki, Japan

Yasuyuki Tsuji

This inventor holds 20 USPTO granted patents, primarily in Electrophotographic Printing. Top assignees: Hitachi Koki Co., Ltd., Hitachi, Ltd., Hitachi Koki. Active years: 1988-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuyuki Tsuji. Retrieved from https://idiyas.com/inventor/yasuyuki-tsuji

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

USPTO Granted Patents = 20

% Patents Active = 100.0

Average Co-Inventor Count = 5.6

ph-index = 8

Forward Citations = 173(Granted Patents)


Location History:

  • Ibaragi, JP (1989)
  • Katsuta, JP (1990 - 1995)
  • Ibaraki, JP (1988 - 1998)
  • Hitachinaka, JP (1998)

Company Filing History:

goldMedal19 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents
silverMedal6 out of 42,731 
 
Hitachi, Ltd.
 patents
bronzeMedal1 out of 3 
 
Hitachi Koki
 patents
where one patent can have more than one assignee

Years Active: 1988-1998

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Areas of Expertise:
Electrophotographic Apparatus
Image Forming
Developing Device
Toner Density Detection
Optical Recording
Printing Apparatus
Continuous Recording
Sheet Registration
Laser Power Control
Movable Slitter
Friction-Conveying Mechanism
Light Beam Scanning
20 patents (USPTO):Explore Patents
1. 5818496 - Exposure device of electrophotographic apparatus with optical path (1998-10-06),
2. 5790168 - Printing apparatus with movable slitter for printed paper sheet (1998-08-04),
3. 5774777 - Continuous recording medium friction-conveying mechanism in image (1998-06-30),
4. 5572290 - Electrophotographic printing system including a plurality of (1996-11-05),
5. 5561514 - Image forming apparatus and sheet arranging method for the apparatus (1996-10-01),
6. 5545840 - Developing device in electrophotographic apparatus including developing (1996-08-13),
7. 5516982 - Developing apparatus having developer regulating member (1996-05-14),
8. 5459562 - Recording apparatus for printing both faces of a recording medium using (1995-10-17),
9. 5453820 - Developing device having a developer mixing chamber for use in (1995-09-26),
10. 5416571 - Developing device for electrophotograph-type printer (1995-05-16),
11. 5402409 - Optical recording apparatus and method for adding information in a (1995-03-28),
12. 5359396 - Toner density detection method for electrophotographic apparatus (1994-10-25),
13. 5179417 - Apparatus for printing on opposite surfaces of a strip of printing paper (1993-01-12),
14. 5039086 - Method and apparatus for adjusting posture of sheets (1991-08-13),
15. 5018718 - Sheet registration method and apparatus for calculation of delay time (1991-05-28),

Title: Innovator Spotlight: Yasuyuki Tsuji - Pioneering Inventor in Ibaraki, Japan

Introduction:

Yasuyuki Tsuji is an esteemed inventor based in Ibaraki, Japan, known for his exceptional contributions to the field of electrophotographic apparatus. With a portfolio boasting 20 patents, Tsuji has made significant strides in revolutionizing printing technology through his innovative creations.

Latest Patents:

Tsuji's recent patents include an exposure device for electrophotographic apparatus featuring a rotary polyhedral mirror for scanning laser beams, a beam interval adjusting member, a rotating mechanism, and an optical path position deciding device. Another groundbreaking invention is a printing apparatus with a movable slitter for printed paper sheets, enhancing precision and efficiency in cutting and sorting printed material.

Career Highlights:

Throughout his career, Tsuji has been associated with renowned companies such as Hitachi Koki Co., Ltd. and Hitachi, Ltd., where he has honed his expertise and brought his inventive ideas to life. His dedication to pushing the boundaries of technology has earned him a stellar reputation in the industry.

Collaborations:

Tsuji has collaborated closely with accomplished colleagues such as Shuuho Yokokawa and Kunitomo Takahashi, pooling their collective knowledge and skills to develop cutting-edge solutions in the realm of printing and imaging technologies. Together, they have achieved remarkable advancements in their field.

Conclusion:

Yasuyuki Tsuji stands as a trailblazer in the world of innovation, continually pushing the envelope with his groundbreaking inventions and unwavering commitment to excellence. His pioneering work in the realm of electrophotographic apparatus and printing technology has left an indelible mark on the industry, inspiring future generations of inventors to pursue bold ideas and transform the landscape of technology.

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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