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For the Inventor, By the Inventor

Fujisawa, Japan

Hideyuki Yamakawa

USPTO Granted Patents = 7

Average Co-Inventor Count = 5.8

ph-index = 7

Forward Citations = 69(Granted Patents)


Location History:

  • San Jose, CA (US) (1999)
  • Fujisawa, JP (1995 - 2005)

Company Filing History:

goldMedal5 out of 42,485 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 46 
 
Hitachi Video and Information System, Inc.
 patents
bronzeMedal1 out of 227 
 
Hitachi Global Storage Technologies Japan, Ltd.
 patents
4. 1 out of 832,680 
Other
 patents
where one patent can have more than one assignee

Years Active: 1995-2005

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7 patents (USPTO):Explore Patents
1. 6980385 - Apparatus for information recording and reproducing (2005-12-27),
2. 6791776 - Apparatus for information recording and reproducing (2004-09-14),
3. 5940416 - Digital signal decoding apparatus and a decoding method used therein (1999-08-17),
4. 5844741 - System for reproducing high-density magnetic record data with viterbi (1998-12-01),
5. 5625632 - Magnetic disk drive including a data discrimination apparatus capable of (1997-04-29),
6. 5553104 - Information recording/reproducing apparatus having a clock timing (1996-09-03),
7. 5448424 - AGC circuit and recording and reproducing apparatus using AGC circuit (1995-09-05),
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