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For the Inventor, By the Inventor

Osaka, Japan

Hirofumi Hasegawa

This inventor holds 31 USPTO granted patents, primarily in Image Forming Technology. Top assignees: Minolta Camera Kabushiki Kaisha, Minolta Company, Ltd., Lexmark International, Inc.. Active years: 1988-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirofumi Hasegawa. Retrieved from https://idiyas.com/inventor/hirofumi-hasegawa

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

USPTO Granted Patents = 31

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 12

Forward Citations = 385(Granted Patents)


Location History:

  • Hatano, JP (1991)
  • Azuchi-Machi, Chuo-Ku, Osaka-Shi, Osaka, JP (1992)
  • Osaka, JP (1989 - 1993)
  • Hadano, JP (1992 - 1994)
  • Toyokawa, JP (1988 - 1998)

Company Filing History:

goldMedal27 out of 2,979 
 
Minolta Camera Kabushiki Kaisha
 patents
silverMedal2 out of 2,816 
 
Minolta Company, Ltd.
 patents
bronzeMedal1 out of 3,045 
 
Lexmark International, Inc.
 patents
4. 1 out of 76 
 
Minolta Camera Co., Ltd.
 patents
5. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1988-1998

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Areas of Expertise:
Image Forming Apparatus
Laser Beam Scanner
Copying Machine
Developing Device
Optical Scanning
Image Reader
Electrophotographic Recorder
Position Indexing Indicators
Compact Image Forming
Image Processing
Shutter Mechanism
Developer Conveying
31 patents (USPTO):Explore Patents
1. 5754926 - Charging device (1998-05-19),
2. 5697017 - Image forming apparatus having process cartridge with shutter and (1997-12-09),
3. 5343223 - Image forming apparatus (1994-08-30),
4. 5253028 - Image forming apparatus having a plurality of vertically stacked image (1993-10-12),
5. 5243390 - Device for conveying developer in a developing device (1993-09-07),
6. 5221943 - Image forming apparatus (1993-06-22),
7. 5162845 - Image forming apparatus (1992-11-10),
8. 5153645 - Position indexing indicators for editing an image forming apparatus (1992-10-06),
9. 5150167 - Image forming apparatus (1992-09-22),
10. 5150166 - Image forming system including attachable sheet supplying units for (1992-09-22),
11. 5122817 - Electrophotographic recorder using a modulated laser beam to scan the (1992-06-16),
12. 5084760 - Copying machine providing copy paper corresponding to read image area (1992-01-28),
13. 5057868 - Developing apparatus having a sealing construction for preventing a (1991-10-15),
14. 5051757 - Optical scanning with cylindrical lens and beam slit (1991-09-24),
15. 5048106 - Image reader (1991-09-10),

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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]
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