Forward Citations = 83

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14 inventors (with patents filed for the assignee):

Masamichi Asano (2 out of 92 patents)

Yasunori Tanaka (2 out of 35 patents)

Hiroshi Iwahashi (2 out of 124 patents)

4. Hiroshi Ushiki (2 out of 22 patents)

5. Tetsuaki Iwasaki (2 out of 3 patents)

6. Akira Narita (2 out of 6 patents)

7. Hideo Hashimoto (2 out of 2 patents)

8. Yukinori Uchino (1 out of 8 patents)

9. Masaki Momodomi (1 out of 57 patents)

10. Hidenobu Minagawa (1 out of 10 patents)

11. Tatsuo Tanaka (1 out of 13 patents)

12. Nana Shigematsu (1 out of 2 patents)

13. Kazushige Koshika (1 out of 1 patent)

14. Kazuto Suzuki (1 out of 3 patents)

7 patents: Sort by Forward Citations

1. 4958151 - Display control circuit (1990-09-18),

2. 4873670 - Complementary semiconductor memory device with pull-up and pull down (1989-10-10),

3. 4791321 - CMOS output circuit device (1988-12-13),

4. 4701748 - Key circuit (1987-10-20),

5. 4697101 - Read/write control circuit (1987-09-29),

6. 4692834 - Electrostatic discharge protection circuit with variable limiting (1987-09-08),

7. 4626795 - Differential amplifier (1986-12-02),

Company Overview

Tosbac Computer System Company Limited is a leading provider of innovative IT solutions for businesses. With a focus on delivering reliable and scalable computer systems, Tosbac has built a reputation for excellence in the industry. Our team of experts is dedicated to providing our clients with cutting-edge technology to help them succeed in the digital age.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#2,287 in Tokyo

#5,456 in Japan

Tokyo, Japan

Tosbac Computer System Company Limited

Forward Citations = 83

14 inventors:

Masamichi Asano (2 out of 92 patents)

Yasunori Tanaka (2 out of 35 patents)

Hiroshi Iwahashi (2 out of 124 patents)

4. Hiroshi Ushiki (2 out of 22 patents)

5. Tetsuaki Iwasaki (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tosbac Computer System Company Limited. Retrieved from https://idiyas.com/company/tosbac-computer-system-company

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

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]