Company Filing History:

11 out of 42,485

Hitachi, Ltd.

where one patent can have more than one assignee

Years Active: 1982-1993

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5233265 - Photoconductive imaging apparatus (1993-08-03),

2. 4980736 - Electric conversion device (1990-12-25),

3. 4900975 - Target of image pickup tube having an amorphous semiconductor laminate (1990-02-13),

4. 4829345 - Electronic device having light transmission system (1989-05-09),

5. 4672015 - Electrophotographic member having multilayered amorphous silicon (1987-06-09),

6. 4433202 - Thin film solar cell (1984-02-21),

7. 4405879 - Photoelectric conversion device and method of producing the same (1983-09-20),

8. 4380557 - Method of production of image pickup device (1983-04-19),

9. 4378417 - Electrophotographic member with .alpha.-Si layers (1983-03-29),

10. 4377628 - Electrophotographic member with .alpha.-Si and H (1983-03-22),

11. 4365013 - Electrophotographic member (1982-12-21),

Title: Hirokazu Matsubara: Innovator in Photoconductive Technology

Introduction

Hirokazu Matsubara is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of photoconductive devices, holding a total of 11 patents. His work focuses on enhancing the sensitivity and stability of photoconductive and photoelectric conversion devices.

Latest Patents

Matsubara's latest patents include a photoconductive imaging apparatus and an electric conversion device. The photoconductive imaging apparatus features a photoconductive layer that includes an amorphous semiconductor layer capable of charge multiplication. This innovation utilizes the avalanche effect of the amorphous semiconductor layer, allowing for a highly sensitive photoconductive device with low lag properties. The electric conversion device also employs an amorphous material composed mainly of tetrahedral elements, which enhances its thermal stability and sensitivity while maintaining a good photoresponse.

Career Highlights

Throughout his career, Matsubara has worked with notable companies such as Hitachi, Ltd. and Nippon Hoso' Kyokai. His experience in these organizations has contributed to his expertise in developing advanced photoconductive technologies.

Collaborations

Matsubara has collaborated with esteemed colleagues, including Sachio Ishioka and Eiichi Maruyama. Their joint efforts have furthered the advancements in the field of photoconductive devices.

Conclusion

Hirokazu Matsubara's innovative work in photoconductive technology has led to significant advancements in the field. His patents reflect a commitment to enhancing device sensitivity and stability, making him a key figure in this area of research.

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