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Naomitsu Umemura

USPTO Granted Patents = 4

Average Co-Inventor Count = 4.0

ph-index = 2

Forward Citations = 27(Granted Patents)

Location History:

Yokohama, JP (1988)
Funabashi, JP (1992)
Tokyo, JP (2003 - 2005)

Company Filing History:

Asahi Glass Company, Limited

Years Active: 1988-2005

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4 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6917576 - Retarder and optical head device installing the same (2005-07-12),

2. 6580674 - Phase shifter and optical head device mounted with the same (2003-06-17),

3. 5142254 - Ultrasonic delay line device with an adjusting circuit for adjusting (1992-08-25),

4. 4733204 - Ultrasonic-wave delay element (1988-03-22),

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