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For the Inventor, By the Inventor

Minamiashigara, Japan

Tadao Sakai

This inventor holds 7 USPTO granted patents. Top assignee: Fuji Photo Film Company, Limited. Active years: 1976-1980.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadao Sakai. Retrieved from https://idiyas.com/inventor/tadao-sakai

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

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 4

Forward Citations = 47(Granted Patents)


Location History:

  • Minami-ashigara, JA (1976)
  • Kanagawa, JA (1976)
  • Minami-ashigara, JP (1979 - 1980)

Company Filing History:

goldMedal7 out of 16,458 
 
Fuji Photo Film Company, Limited
 patents

Years Active: 1976-1980

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7 patents (USPTO):Explore Patents
1. 4219615 - Color intensification process for sound images (1980-08-26),
2. 4216284 - Color photographic light-sensitive material (1980-08-05),
3. 4208210 - Process for forming an optical soundtrack (1980-06-17),
4. 4166050 - Method of increasing the viscosity of photographic coating solutions (1979-08-28),
5. 3964905 - Color photograhic material having a bleach inhibitor therein defining a (1976-06-22),
6. 3945824 - Process for forming optical sound track (1976-03-23),
7. 3940271 - Color photographic light-sensitive material (1976-02-24),

Title: Tadao Sakai: Innovator in Color Photographic Technology

Introduction

Tadao Sakai is a notable inventor based in Minami-ashigara, Japan. He has made significant contributions to the field of color photographic technology, holding a total of 7 patents. His work has advanced the methods of sound image recording and processing.

Latest Patents

Sakai's latest patents include a color intensification process for sound images. This innovative process involves a multilayer color photographic material that is designed for optically recording sound images on a sound track area. The material consists of a support coated with at least one silver halide emulsion layer containing a color coupler in a specific stoichiometric ratio. Additionally, he has developed a color photographic light-sensitive material that comprises multiple light-sensitive silver halide emulsion layers containing various dye-forming couplers. This material allows for the creation of silver images for sound recording without the need for conventional processing steps.

Career Highlights

Tadao Sakai is associated with Fuji Photo Film Company, Limited, where he has contributed to the development of advanced photographic materials. His work has been instrumental in enhancing the quality and efficiency of color photographic processes.

Collaborations

Sakai has collaborated with notable coworkers such as Masayoshi Kawai and Tadao Shishido. Their combined expertise has fostered innovation in the field of photography.

Conclusion

Tadao Sakai's contributions to color photographic technology have had a lasting impact on the industry. His innovative patents continue to influence the methods used in sound image recording and processing.

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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