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For the Inventor, By the Inventor

Hino, Japan

Hirofumi Ohtani

This inventor holds 18 USPTO granted patents, primarily in Silver Halide Photography. Top assignees: Konica Corporation, Konishiroku Photo Industry Co., Ltd., Merck Patent Gmbh. Active years: 1987-2022.

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

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

Calculating rank
USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 3.2

ph-index = 5

Forward Citations = 52(Granted Patents)


Location History:

  • Tokyo, JP (1991)
  • Hachioji, JP (1991)
  • Hino, JP (1987 - 2022)

Company Filing History:

goldMedal13 out of 3,106 
 
Konica Corporation
 patents
silverMedal2 out of 1,252 
 
Konishiroku Photo Industry Co., Ltd.
 patents
bronzeMedal2 out of 3,025 
 
Merck Patent Gmbh
 patents
4. 1 out of 4,397 
 
Konica Minolta, Inc.
 patents

Years Active: 1987-2022

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Areas of Expertise:
Optical Fingerprint Authentication
Silver Halide Photographic Material
Organic Electroluminescent Element
Ultrafine Gold Chalcogenide
High-Speed Halide Material
Photosensitive Emulsion
Color Photographic Material
Dye-Sensitized Core/Shell
18 patents (USPTO):Explore Patents
1. 11507649 - Optical fingerprint authentication device (2022-11-22),
2. 10853465 - Optical fingerprint authentication device (2020-12-01),
3. 9929379 - Method for producing organic electroluminescent element (2018-03-27),
4. 5541052 - Silver halide photographic material having improved keeping quality (1996-07-30),
5. 5523202 - Silver halide emulsion and process for its preparation (1996-06-04),
6. 5518874 - Method of manufacturing a silver halide emulsion (1996-05-21),
7. 5362619 - High-speed halide photographic light-sensitive material (1994-11-08),
8. 5362470 - Ultrafine gold and/or silver chalcogenide and production thereof (1994-11-08),
9. 5358841 - Method for preparing a silver halide emulsion (1994-10-25),
10. 5340710 - Photosensitive silver halide photographic material (1994-08-23),
11. 5334359 - Apparatus for production of sparingly water-soluble salt crystal grains (1994-08-02),
12. H001196 - Color photographic light-sensitive material excellent in color (1993-05-31),
13. 5200308 - Color photographic material (1993-04-06),
14. 5041366 - Silver halide photographic material (1991-08-20),
15. 5039601 - Silver halide emulsions with silver halide grain groups of different (1991-08-13),

Title: Hirofumi Ohtani - Innovator in Optical Fingerprint Authentication

Introduction

Hirofumi Ohtani is a notable inventor located in Hino, Japan. With an impressive portfolio of 18 patents, he has made significant contributions to the field of optical fingerprint authentication technology.

Latest Patents

His latest innovation is an optical fingerprint authentication device, which integrates a light source and an image sensor to detect diffused light. This device utilizes an organic electroluminescence panel, which consists of a light-emitting portion and a light-transmitting non-light-emitting portion. The light-emitting region is configured by an organic electroluminescence element. Additionally, the device incorporates a fingerprint information reader with the image sensor positioned adjacent to the non-light-emitting portion, further enhancing its functionality.

Career Highlights

Hirofumi Ohtani has had a distinguished career, working for prestigious companies such as Konica Corporation and Konishiroku Photo Industry Co., Ltd. His experience in these organizations has greatly influenced his innovative endeavors in technology.

Collaborations

Throughout his career, Ohtani has collaborated with talented individuals, including Syoji Matsuzaka and Hiroshi Okusa. These collaborations have enriched his research and led to groundbreaking advancements in the field of fingerprint authentication.

Conclusion

In conclusion, Hirofumi Ohtani stands out as an accomplished inventor in the realm of optical fingerprint authentication. With a strong background and noteworthy collaborations, he continues to contribute to innovations that enhance security and technology. His work not only exemplifies his expertise but also sets the foundation for future advancements in this critical area.

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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