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For the Inventor, By the Inventor

Tokyo, Japan

Isamu Hirai

This inventor holds 54 USPTO granted patents and 1 published patent application, plus 5 CIPO patents, primarily in Camera Technology (CPC class 3544). Top assignees: Asahi Kogaku Kogyo Kabushiki Kaisha, Pentax Corporation, Hoya Corporation. Active years: 1986-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Isamu Hirai. Retrieved from https://idiyas.com/inventor/isamu-hirai

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

USPTO Granted Patents = 54 

% Patents Active = 79.6


Average Co-Inventor Count = 1.8

ph-index = 11

Forward Citations = 498(Granted Patents)

Forward Citations (Not Self Cited) = 476(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Fuchu, JP (1992 - 1993)
  • Tokyo, JP (1986 - 2015)

Company Filing History:

goldMedal38 out of 3,132 
 
Asahi Kogaku Kogyo Kabushiki Kaisha
 patents
silverMedal10 out of 1,056 
 
Pentax Corporation
 patents
bronzeMedal5 out of 2,566 
 
Hoya Corporation
 patents
4. 1 out of 94 
 
Ricoh Imaging Company, Ltd.
 patents

Years Active: 1986-2015

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Areas of Expertise:
Optical Device
Single Lens Reflex Camera
Photometry Device
Exposure Control System
Photographing Apparatus
AF Auxiliary Light
Flash Control
Photometric Device
Strobe Control
Image Pickup Device
Light Receiver Unit
Exposure Mode Selection
54 patents (USPTO):Explore Patents
1. 9179049 - Optical device and single lens reflex camera (2015-11-03),
2. 8072508 - Photographing apparatus having first and second operation devices (2011-12-06),
3. 7961250 - Photographing apparatus having an exposure mode selection function (2011-06-14),
4. 7961245 - Image surface illuminance varying apparatus, exposure correcting apparatus, and exposure correcting method (2011-06-14),
5. 7692708 - Photometric apparatus (2010-04-06),
6. 7683410 - Image pickup device (2010-03-23),
7. 6718134 - AF auxiliary light projector for AF camera (2004-04-06),
8. 6707997 - Flash control system (2004-03-16),
9. 6603928 - Photometry device (2003-08-05),
10. 6571058 - Photometry device (2003-05-27),
11. 6567617 - Photometry device with light and colorimetric sensors (2003-05-20),
12. 6556788 - Photometry device (2003-04-29),
13. 6535693 - Photometry device (2003-03-18),
14. 6510285 - Strobe control device (2003-01-21),
15. 6510284 - Photometry device for a camera including external light sensor (2003-01-21),

Title: The Innovative Journey of Isamu Hirai

Introduction: Isamu Hirai is a renowned inventor hailing from Tokyo, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Isamu Hirai holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Isamu Hirai has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs.

Collaborations: Throughout his career, Isamu Hirai has collaborated with top researchers, engineers, and scientists both locally and internationally, fostering a culture of innovation and knowledge sharing.

Conclusion: Isamu Hirai's passion for innovation and his relentless pursuit of technological excellence have solidified his position as a pioneering inventor in the global tech industry.

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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