Keiji Mihayashi

This inventor holds 112 USPTO granted patents and 1 published patent application, primarily in Silver Halide Photography (CPC class 430957). Top assignees: Fuji Photo Film Company, Limited, Fujifilm Corporation. Active years: 1983-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Mihayashi. Retrieved from https://idiyas.com/inventor/keiji-mihayashi

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

USPTO Granted Patents = 112 (Patent Applications = 1)

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 12

Forward Citations = 714(Granted Patents)

Forward Citations (Not Self Cited) = 636(Dec 10, 2025)

Inventors with similar research interests:

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Location History:

all Kanagawa, JP (1992)
Ashigara, JP (1994)
Kanagawa, JP (1983 - 2001)
Minami-ashigara, JP (1983 - 2008)

Company Filing History:

111 out of 16,458

Fuji Photo Film Company, Limited

Years Active: 1983-2008

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Areas of Expertise:

Optical Film

Polarizing Plate

Photographic Emulsion

Silver Halide

Light-Sensitive Material

Abrasive Tape

Hydroxamic Acid

Color Photographic Material

Processing Methods

Photographic Materials

Photosensitive Materials

Imidazole Derivatives

112 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7462382 - Optical compensating sheet, production method thereof, optical film, and polarizing plate and liquid crystal display device using the same (2008-12-09),

2. 6251577 - Method of manufacturing silver halide photographic emulsion, silver halide photographic emulsion manufactured by the method, and method of inhibiting aggregation of the emulsion (2001-06-26),

3. 6180818 - Silver halide photographic material and hydroxamic acid-base compound for use therein (2001-01-30),

4. 6114570 - Silver halide photographic material and hydroxamic acid-based compound (2000-09-05),

5. 5935772 - Silver halide photographic light-sensitive material and package thereof (1999-08-10),

6. 5851754 - Silver halide photographic material and hydroxamic acid-base compound (1998-12-22),

7. 5843631 - Silver halide photographic material (1998-12-01),

8. 5840886 - Silver halide photographic material and hydroxamic acid based compound (1998-11-24),

9. 5837438 - Silver halide color photographic photosensitive material (1998-11-17),

10. 5837436 - Silver halide color photographic material and package thereof (1998-11-17),

11. 5719015 - Silver halide photographic material and method for processing the same (1998-02-17),

12. 5702800 - Abrasive tape for magnetic information reading apparatus for (1997-12-30),

13. 5667959 - Silver halide photographic material and hydroxamic acid based compound (1997-09-16),

14. 5631122 - Silver halide color photographic material (1997-05-20),

15. 5630927 - Silver halide color light-sensitive material (1997-05-20),

Certainly! Here is an article about inventor Keiji Mihayashi:

Title: Keiji Mihayashi: A Visionary Inventor Shaping the Future of Technology

Introduction:

Keiji Mihayashi, a visionary inventor hailing from Kanagawa, Japan, has become synonymous with passion for innovation and a relentless pursuit of excellence. His groundbreaking work has not only solidified his reputation in the field but continues to inspire future generations of inventors worldwide.

Latest Patents:

With an impressive portfolio of 112 patents, Keiji Mihayashi's latest patents include innovations such as the Optical Compensating Sheet, a production method for the same, an optical film, and a polarizing plate and liquid crystal display device using the technology. These patents revolutionize the way we interact with display technologies and underscore Mihayashi's commitment to pushing the boundaries of what is possible.

Career Highlights:

Throughout his illustrious career, Keiji Mihayashi has made significant contributions to companies such as Fuji Photo Film Company, Limited, and Fujifilm Corporation. His expertise and innovative spirit have been instrumental in driving forward the technological advancements of these renowned organizations.

Collaborations:

Working alongside esteemed colleagues such as Seiji Ichijima and Naoki Saito, Keiji Mihayashi has fostered a culture of collaboration and teamwork. Together, they have combined their talents and expertise to bring cutting-edge inventions to life, further cementing Mihayashi's status as a pioneering inventor.

Conclusion:

In conclusion, Keiji Mihayashi's unwavering dedication to innovation and his penchant for excellence have positioned him as a leading figure in the world of technology. His inventions not only shape the current technological landscape but also pave the way for future advancements that will continue to impact society for years to come. Keiji Mihayashi's legacy as a visionary inventor is sure to inspire generations of inventors to dream big and push the boundaries of what is possible in the realm of innovation and 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]

1 patent pending: