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For the Inventor, By the Inventor

Tokyo, Japan

Masanao Kasai

This inventor holds 9 USPTO granted patents. Top assignee: Canon Kabushiki Kaisha. Active years: 1978-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masanao Kasai. Retrieved from https://idiyas.com/inventor/masanao-kasai

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 5

Forward Citations = 215(Granted Patents)


Location History:

  • Tokyo, JA (1978)
  • Tabata, JP (1981)
  • Kawasaki, JP (1984)
  • Tokyo, JP (1980 - 1985)

Company Filing History:

goldMedal9 out of 92,994 
 
Canon Kabushiki Kaisha
 patents

Years Active: 1978-1985

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9 patents (USPTO):Explore Patents
1. 4551003 - Electrophotographic process and apparatus therefor (1985-11-05),
2. 4440735 - Process for production of photoconductive cadmium sulfide (1984-04-03),
3. 4409310 - Surface doped inorganic electrophotographic photosensitive particles in (1983-10-11),
4. 4335198 - Process for recording (1982-06-15),
5. 4316948 - Photoconductive CdS powder material for electrophotography (1982-02-23),
6. 4307408 - Recording apparatus using coherent light (1981-12-22),
7. 4286032 - Electrophotographic process and apparatus therefor (1981-08-25),
8. 4214249 - Recording member for laser beam and process for recording (1980-07-22),
9. 4069487 - Recording member and process for recording (1978-01-17),

Title: The Innovations of Masanao Kasai

Introduction

Masanao Kasai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electrophotography and photoconductive materials. With a total of 9 patents to his name, his work has had a lasting impact on imaging technologies.

Latest Patents

One of his latest patents is titled "Electrophotographic process and apparatus therefor." This invention presents a process and an apparatus for repeatedly forming a high contrast image on a photosensitive member, which substantially comprises a conductive layer, a photoconductive layer, and an insulating layer. According to this invention, during the processing steps of a latent image formed on the photosensitive member, an exposure step or means is provided for preventing the effect of a corona discharge of the same polarity as that of the photoconductive layer from affecting the succeeding latent image formation on the photosensitive member. Another notable patent is the "Process for production of photoconductive cadmium sulfide." This process is characterized by the addition of a flux to cadmium sulfide in an amount of at least 20 weight percent based on the cadmium sulfide, with the resulting mixture being fired at a temperature higher than the melting point of said flux by at least 50 degrees Celsius.

Career Highlights

Masanao Kasai is currently associated with Canon Kabushiki Kaisha, a leading company in imaging and printing technologies. His work at Canon has allowed him to explore innovative solutions in the field of electrophotography.

Collaborations

He has collaborated with notable coworkers such as Hitoshi Hanadate and Hiroshi Hanada, contributing to advancements in their respective fields.

Conclusion

Masanao Kasai's contributions to the field of electrophotography and photoconductive materials highlight his innovative spirit and dedication to advancing technology. His patents continue to influence the industry and pave the way for future developments.

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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