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Iwatsu Electric Company Ltd.

USPTO Granted Patents = 190

% Expired Patents = 4.7

EPO Patents = 1

Trademarks = 2

Forward Citations = 1,932

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227 inventors (with patents filed for the assignee):

Norio Kokaji (14 out of 14 patents)

Akira Sekiguchi (10 out of 17 patents)

Takashi Oshima (8 out of 65 patents)

4. Yoshihiro Kawata (7 out of 9 patents)

5. Kunio Kinoshita (7 out of 17 patents)

6. Takefumi Kato (7 out of 7 patents)

7. Toshio Koike (6 out of 85 patents)

8. Atsushi Fujimoto (6 out of 9 patents)

9. Kiyoshi Tsuboi (6 out of 10 patents)

10. Tamio Iwamoto (6 out of 6 patents)

11. Hideaki Kodama (6 out of 6 patents)

12. Toshimichi Shimatani (5 out of 5 patents)

13. Sadao Itoh (5 out of 5 patents)

14. Yousuke Igarashi (5 out of 5 patents)

15. Ryoji Yamaguchi (5 out of 5 patents)

Core Competencies:

Multi-Antenna

Wireless Communication

Packet Transmission

Mobile Communication

Telephony

Conference Telephone

Analog Switch Circuit

Diversity Communication

Electrophotographic Printing

Defect Detection

Oscilloscope

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190 patents: Sort by Forward Citations

1. 8605658 - Multi-antenna wireless communication method and multi-antenna wireless communication device (2013-12-10),

2. 8385455 - Multi-antenna wireless communication method, multi-antenna wireless communication system, and multi-antenna wireless communication device (2013-02-26),

3. D663768 - Printer (2012-07-17),

4. 8041838 - Content display device and content display method (2011-10-18),

5. 8011636 - Electronic apparatus with a stand (2011-09-06),

6. D583353 - Console for telephone (2008-12-23),

7. 7424661 - Packet transmission system in wireless LAN (2008-09-09),

8. D576146 - Telephone (2008-09-02),

9. D575263 - Telephone (2008-08-19),

10. D575262 - Telephone (2008-08-19),

11. D557676 - Conference telephone (2007-12-18),

12. 7280531 - Telephone communication system (2007-10-09),

13. D529894 - Telephone set (2006-10-10),

14. D515063 - Telephone set (2006-02-14),

15. 6996169 - Decision feedback equalizer (2006-02-07),

Iwatsu Electric Company Ltd. is a leading Japanese telecommunications equipment manufacturer established in 1938. With a strong focus on innovation, research, and development, Iwatsu has developed a wide range of cutting-edge solutions for the telecommunications industry worldwide. The company offers telecommunications equipment, including telephone systems, IP-PBX systems, network cameras, and video conferencing systems. Iwatsu aims to deliver advanced and reliable communication technologies to enhance productivity and improve communication efficiency for businesses and individuals.

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

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USPTO Data Jan 1 1976 - Sep 15 2026

Iwatsu Electric Company Ltd.

190 Patents

#371 in Tokyo

#735 in Japan

#4,423 in the World

Iwatsu Electric Company Ltd.

Forward Citations = 1,932

227 inventors:

Norio Kokaji (14 out of 14 patents)

Akira Sekiguchi (10 out of 17 patents)

Takashi Oshima (8 out of 65 patents)

4. Yoshihiro Kawata (7 out of 9 patents)

5. Kunio Kinoshita (7 out of 17 patents)

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