Kohzaburoh Yamada

This inventor holds 53 USPTO granted patents, primarily in Photothermographic Materials (CPC class 4304). Top assignees: Fuji Photo Film Company, Limited, Fujifilm Corporation. Active years: 1987-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kohzaburoh Yamada. Retrieved from https://idiyas.com/inventor/kohzaburoh-yamada

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

USPTO Granted Patents = 53

% Patents Active = 79.2

Average Co-Inventor Count = 3.2

ph-index = 9

Forward Citations = 179(Granted Patents)

Forward Citations (Not Self Cited) = 166(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Kanaqawa, JP (2001)
Minami-ashigara, JP (1994 - 2005)
Kanagawa, JP (1987 - 2007)

Company Filing History:

51 out of 16,458

Fuji Photo Film Company, Limited

Years Active: 1987-2007

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Areas of Expertise:

Photothermographic Material

Silver Halide

Photosensitive Material

Thermographic Recording Element

Image Recording Material

Chemical Sensitization

Emulsion Processing

Light Sensitive Material

Heat Developable

Development Processing

Hydrazine Compound

Photographic Products

53 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7211373 - Photothermographic material (2007-05-01),

2. 7147999 - Photothermographic material (2006-12-12),

3. 7026109 - Photothermographic material (2006-04-11),

4. 6878510 - Method of processing silver halide photosensitive material (2005-04-12),

5. 6844146 - Silver halide color photosensitive material (2005-01-18),

6. 6787298 - Photothermographic material (2004-09-07),

7. 6783923 - Silver halide color photosensitive material and photographic product (2004-08-31),

8. 6746835 - Thermally processed image recording material (2004-06-08),

9. 6696215 - Silver halide photographic light sensitive material (2004-02-24),

10. 6689554 - Silver handle emulsion and silver halide photographic lightsensitive material (2004-02-10),

11. 6686140 - Silver halide photosensitive material (2004-02-03),

12. 6638705 - Silver halide emulsion and chemical sensitization method thereof (2003-10-28),

13. 6593075 - Silver halide photographic light-sensitive material (2003-07-15),

14. 6586170 - Thermographic recording element (2003-07-01),

15. 6521389 - Silver halide photographic light-sensitive material and processing method thereof (2003-02-18),

Title: Kohzaburoh Yamada: Pioneer in Photothermographic Materials

Introduction: Kohzaburoh Yamada, an innovative inventor based in Minami-Ashigara, Japan, has made significant contributions to the field of photothermographic materials. With an impressive portfolio of 53 patents, his work has advanced the capabilities of silver halide technologies used in various imaging processes.

Latest Patents: Among his latest patents, Yamada has developed a photothermographic material that features a unique composition comprising a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder on one surface of a support. This innovative material specifies that the silver behenate content of the organic silver salt is between 40 to 70 mol%. Additionally, it contains compounds that can undergo one-electron oxidation to yield oxidation products that release electrons during subsequent reactions. Another patent describes a similar photothermographic material, emphasizing the use of organic solvents during application and including compounds with specific properties to enhance interaction with silver halides.

Career Highlights: Kohzaburoh Yamada has held significant positions at reputable companies within the imaging sector. He has worked at Fuji Photo Film Company, Limited, and Fujifilm Corporation, where he has continuously pushed the boundaries of photothermographic technologies.

Collaborations: Throughout his career, Yamada has collaborated with notable professionals such as Toshihide Ezoe and Hiroyuki Suzuki. These partnerships have played a crucial role in refining his inventions and propelling advancements in the field.

Conclusion: Kohzaburoh Yamada stands out as a prominent inventor whose contributions have greatly influenced the development of photothermographic materials. His extensive patent portfolio reflects his dedication to innovation and his commitment to advancing technology within the imaging 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]