Tomoaki Yokoyama

This inventor holds 23 USPTO granted patents, primarily in Image Forming Technology. Top assignee: Minolta Camera Kabushiki Kaisha. Active years: 1988-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomoaki Yokoyama. Retrieved from https://idiyas.com/inventor/tomoaki-yokoyama

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

USPTO Granted Patents = 23

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 8

Forward Citations = 199(Granted Patents)

Location History:

Osaka, JP (1990 - 1991)
Toyohashi, JP (1992)
Toyokawa, JP (1988 - 1994)
Aichi, JP (1988 - 1996)

Company Filing History:

23 out of 2,979

Minolta Camera Kabushiki Kaisha

patents

Years Active: 1988-1996

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Areas of Expertise:

Image Forming Apparatus

Developing Devices

Toner Supply

Electrophotographic Copying

Multi-Color Images

Magnetic Brush

Variable Developing Bias

Copier Machines

Reversal Image Forming

Outline Images

23 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5491541 - Developing apparatus having adjacent similar magnetic poles (1996-02-13),

2. 5442425 - Developing apparatus (1995-08-15),

3. 5283615 - Image forming apparatus having a plurality of developing devices (1994-02-01),

4. 5122843 - Image forming apparatus having developing devices which use different (1992-06-16),

5. 5063127 - Method for forming multi-color images (1991-11-05),

6. 5040023 - Method and apparatus for supplying toner to a developing device in an (1991-08-13),

7. 5038176 - Image forming apparatus having plural magnetic brush developing devices (1991-08-06),

8. 5036369 - Image forming apparatus (1991-07-30),

9. 5012285 - Developing apparatus including a partitioning arrangement for (1991-04-30),

10. 5006893 - Image forming apparatus with improved toner replenishment (1991-04-09),

11. 4924270 - Toner supply device for use in image forming apparatus (1990-05-08),

12. 4917043 - Developing device in an image forming apparatus (1990-04-17),

13. 4912513 - Developing apparatus with variable developing bias voltage (1990-03-27),

14. 4897331 - Reversal image forming method (1990-01-30),

15. 4891287 - Image editing method (1990-01-02),

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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]