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For the Inventor, By the Inventor

Yokohama, Japan

Yoshikuni Tohyama

This inventor holds 15 USPTO granted patents. Top assignee: Canon Kabushiki Kaisha. Active years: 1977-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshikuni Tohyama. Retrieved from https://idiyas.com/inventor/yoshikuni-tohyama

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

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 8

Forward Citations = 219(Granted Patents)


Location History:

  • Tokyo, JA (1977 - 1978)
  • Tokyo, JP (1978 - 1980)
  • Yokohama, JP (1981 - 1990)

Company Filing History:

goldMedal15 out of 92,994 
 
Canon Kabushiki Kaisha
 patents

Years Active: 1977-1990

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15 patents (USPTO):Explore Patents
1. 4916490 - Image forming apparatus comprising a plurality of developing devices (1990-04-10),
2. 4845528 - Double-side image forming apparatus (1989-07-04),
3. 4803520 - Electrophotographic apparatus for making superposed images (1989-02-07),
4. 4544262 - Transfer station alignment device (1985-10-01),
5. 4402595 - Scanning type image formation apparatus (1983-09-06),
6. 4375331 - Slit exposure device with white reflecting member (1983-03-01),
7. 4323308 - Copy magnification modifying apparatus (1982-04-06),
8. 4302098 - Printing apparatus (1981-11-24),
9. 4243311 - Image forming apparatus (1981-01-06),
10. 4218131 - Cleaning device (1980-08-19),
11. 4168901 - Developer housing sealing device for electrophotography (1979-09-25),
12. 4163549 - Separator device for transfer medium (1979-08-07),
13. 4129377 - Variable magnification copying apparatus (1978-12-12),
14. 4072211 - Driving device for a moving body (1978-02-07),
15. 4000942 - Transfer medium separating device (1977-01-04),

Title: Innovations of Yoshikuni Tohyama

Introduction

Yoshikuni Tohyama is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of image forming technology, holding a total of 15 patents. His work has been instrumental in advancing the capabilities of imaging devices, particularly in the context of multifunctional printers.

Latest Patents

Tohyama's latest patents include an "Image forming apparatus comprising a plurality of developing devices." This invention features at least first and second developing devices that utilize developers of different colors to develop latent images on an image bearing member. The first developing device is designed to be detachable, allowing for easy exchange, while the second is fixedly mounted and contains a predetermined color developer.

Another notable patent is the "Double-side image forming apparatus." This device is equipped with first and second input devices for entering function data and the number of copies to be produced. It includes a memory for storing function data and a storage compartment for sheets during duplex copying. The apparatus operates in two procedures, allowing for efficient image formation on both sides of the sheet.

Career Highlights

Yoshikuni Tohyama is associated with Canon Kabushiki Kaisha, a leading company in imaging and printing technology. His innovative work has contributed to Canon's reputation for high-quality imaging solutions. Tohyama's patents reflect his commitment to enhancing the functionality and efficiency of image forming devices.

Collaborations

Throughout his career, Tohyama has collaborated with notable colleagues, including Koichi Miyamoto and Tadayuki Kitajima. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies in the imaging sector.

Conclusion

Yoshikuni Tohyama's contributions to the field of image forming technology are significant and impactful. His innovative patents continue to shape the future of imaging devices, demonstrating his expertise and dedication to advancing 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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