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For the Inventor, By the Inventor

Hamamatsu, Japan

Yasushi Watase

This inventor holds 8 USPTO granted patents. Top assignee: Hamamatsu-Photonics K.k.. Active years: 1992-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasushi Watase. Retrieved from https://idiyas.com/inventor/yasushi-watase

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

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 3

Forward Citations = 29(Granted Patents)


Location History:

  • Hamamatsu, JP (1992 - 1997)
  • Hamamatu, JP (1997)

Company Filing History:

goldMedal8 out of 3,135 
 
Hamamatsu-Photonics K.k.
 patents

Years Active: 1992-1997

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8 patents (USPTO):Explore Patents
1. 5633562 - Reflection mode alkali photocathode, and photomultiplier using the same (1997-05-27),
2. 5633493 - Image tube having a YAG crystal (1997-05-27),
3. 5623182 - Reflections mode alkali photocathode and photomultiplier using the same (1997-04-22),
4. 5561347 - Photomultiplier (1996-10-01),
5. 5557166 - Reflection-type photoelectronic surface and photomultiplier (1996-09-17),
6. 5463272 - Cathode for photoelectric emission, cathode for secondary electron (1995-10-31),
7. 5210403 - Radiation detecting device with a photocathode being inclined to a light (1993-05-11),
8. 5095202 - Proximity image intensifier (1992-03-10),

Title: Innovations of Yasushi Watase

Introduction

Yasushi Watase is a prominent inventor based in Hamamatsu, Japan. He has made significant contributions to the field of photonics, holding a total of 8 patents. His work focuses on advancements in image tubes and photocathodes, showcasing his expertise and innovative spirit.

Latest Patents

One of his latest patents is an image tube that incorporates a YAG crystal. This image tube converts irradiated electrons into fluorescence by directing electrons, which are converted from a light beam by a photocathode, onto a YAG crystal member. The design ensures that the fluorescence generated on the input surface of the YAG crystal member contains no fixed pattern noise due to its single unitary solid structure. Another notable invention is a reflection mode alkali photocathode, which improves upon existing designs by controlling the deposition weight of antimony. This photocathode features a thin layer of antimony directly deposited on a base substrate and activated by alkali metals. The thin film is deposited at a thickness of below 100 µg/cm², making it suitable for use in photomultipliers. The base substrates can include materials such as nickel, aluminum, and stainless steel, while the alkali metals used can be cesium, potassium, sodium, and rubidium.

Career Highlights

Yasushi Watase is currently employed at Hamamatsu Photonics K.K., where he continues to innovate and develop new technologies in the field of photonics. His work has had a significant impact on the industry, particularly in the development of advanced imaging technologies.

Collaborations

Throughout his career, Yasushi has collaborated with notable colleagues, including Hiroaki Washiyama and Takehiro Iida. These collaborations have further enhanced his research and development efforts, leading to groundbreaking innovations.

Conclusion

Yasushi Watase's contributions to the field of photonics through his patents and collaborations highlight his role as a leading inventor. His innovative work continues to shape the future of imaging technologies.

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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