For the Inventor, By the Inventor

Enter assignee name

Hitachi, Ltd. Hitachi Cabel

USPTO Granted Patents = 1

Forward Citations = 16

Loading Chart...

Loading Chart...

5 inventors (with patents filed for the assignee):

Akihito Hongo (1 out of 19 patents)

Hiroyoshi Matsumura (1 out of 38 patents)

Kenji Hiruma (1 out of 16 patents)

4. Koji Ishida (1 out of 28 patents)

5. Kazuyuki Nagatsuma (1 out of 12 patents)

1 patent: Sort by Forward Citations

1. 4737015 - Optical waveguide having a silicon oxi-nitride layer (1988-04-12),

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

1 Patents

#5,734 in Tokyo

#15,549 in Japan

Hitachi, Ltd. Hitachi Cabel

Forward Citations = 16

5 inventors:

Akihito Hongo (1 out of 19 patents)

Hiroyoshi Matsumura (1 out of 38 patents)

Kenji Hiruma (1 out of 16 patents)

4. Koji Ishida (1 out of 28 patents)

5. Kazuyuki Nagatsuma (1 out of 12 patents)

Please report any incorrect information to support@idiyas.com

Loading…