Company Filing History:

4 out of 42,485

Hitachi, Ltd.

patents

1 out of 217

Hitachi Device Engineering Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1994-1996

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4 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 5548399 - Method and apparatus for testing a DC coupled optical receiver (1996-08-20),

2. 5543629 - Superlattice avalanche photodiode (APD) (1996-08-06),

3. 5422968 - Optical demultiplexing system with optical amplifiers (1995-06-06),

4. 5324959 - Semiconductor optical device having a heterointerface therein (1994-06-28),

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For the Inventor, By the Inventor

Shoichi Hanatani

Location History:

Company Filing History:

Years Active: 1994-1996