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Hirofumi Yanagawa

USPTO Granted Patents = 7

Average Co-Inventor Count = 1.5

ph-index = 6

Forward Citations = 211(Granted Patents)

Location History:

Saitama, JP (1985)
Saitama-ken, JP (1997)
Tokyo, JP (1992 - 1999)
Tsurugashima, JP (1999)

Company Filing History:

Pioneer Electronic Corporation

Years Active: 1985-1999

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5987143 - Method and apparatus for erasing acoustic echo (1999-11-16),

2. 5953432 - Line source speaker system (1999-09-14),

3. 5604810 - Sound field control system for a multi-speaker system (1997-02-18),

4. 5604809 - Sound field control system (1997-02-18),

5. 5233664 - Speaker system and method of controlling directivity thereof (1993-08-03),

6. 5128999 - Sound field correcting apparatus (1992-07-07),

7. 4509184 - Stereo sound system (1985-04-02),

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