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Iwasaki Tsushinki Kabushiki Kaisha

USPTO Granted Patents = 33

Trademarks = 1

Forward Citations = 203

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44 inventors (with patents filed for the assignee):

Kouichi Sekiguchi (6 out of 6 patents)

Hikaru Takematsu (6 out of 6 patents)

Koichi Sekiguchi (4 out of 9 patents)

4. Norio Saneyoshi (3 out of 3 patents)

5. Teruo Matsufuji (3 out of 7 patents)

6. Yoshihiro Kawata (2 out of 9 patents)

7. Akihiko Suzuki (2 out of 2 patents)

8. Kazutada Katsukura (2 out of 2 patents)

9. Kazuyuki Yamamoto (2 out of 3 patents)

10. Tetsuro Inomata (2 out of 2 patents)

11. Masafumi Soma (2 out of 2 patents)

12. Yoshihiko Kohno (2 out of 2 patents)

13. Akira Hirato (2 out of 3 patents)

14. Akiho Doi (2 out of 2 patents)

15. Tsunetaka Sakata (2 out of 2 patents)

33 patents: Sort by Forward Citations

1. 4592046 - Subscriber's circuit for time division switching system (1986-05-27),

2. 4583214 - Key telephone transmission system (1986-04-15),

3. 4558369 - Facsimile connection system (1985-12-10),

4. 4551583 - Control signal transmission system for key telephone system (1985-11-05),

5. 4523289 - Time interval measuring system (1985-06-11),

6. 4502139 - Howler tone sending-out system in time-division electronic exchanges (1985-02-26),

7. 4502138 - Synchronization system for key telephone system (1985-02-26),

8. 4490820 - Reception system for key telephone system (1984-12-25),

9. 4479085 - Power source circuit (1984-10-23),

10. 4450571 - Two-way signal transmission and one-way DC power supply using a single (1984-05-22),

11. 4410767 - Key telephone system (1983-10-18),

12. 4399512 - Waveform searching system (1983-08-16),

13. 4380690 - Hybrid circuit (1983-04-19),

14. 4367375 - Push-button dial circuit (1983-01-04),

15. 4353066 - Channel switching network (1982-10-05),

Iwasaki Tsushinki Kabushiki Kaisha is a Japanese company that specializes in the development and manufacturing of electronic products. With a rich history dating back to 1929, the company has been at the forefront of innovation in areas such as telecommunication and information systems. Their diverse range of products includes wireless communication devices, security systems, and electronic components. Dedicated to delivering high-quality solutions, Iwasaki Tsushinki Kabushiki Kaisha continuously strives to meet the evolving needs of its customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 2 2025

33 Patents

#76 in

#2,147 in Japan

#19,508 in the World

Iwasaki Tsushinki Kabushiki Kaisha

Forward Citations = 203

44 inventors:

Kouichi Sekiguchi (6 out of 6 patents)

Hikaru Takematsu (6 out of 6 patents)

Koichi Sekiguchi (4 out of 9 patents)

4. Norio Saneyoshi (3 out of 3 patents)

5. Teruo Matsufuji (3 out of 7 patents)

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