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Masaaki Sofue

USPTO Granted Patents = 10

Average Co-Inventor Count = 1.7

ph-index = 5

Forward Citations = 70(Granted Patents)

Location History:

Hadano, JP (1992 - 1998)
Machida, JP (1999)
Yokohama, JP (2000)
Tokyo, JP (1999 - 2002)

Company Filing History:

10 out of 28,544

Ricoh Company, Ltd.

Years Active: 1992-2002

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10 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 6353583 - Signal operational circuit for a multi-beam pick-up device (2002-03-05),

2. 6147947 - Optical disk apparatus for accessing optical disks with different (2000-11-14),

3. 6128259 - Optical pickup apparatus for accurate detection of a tracking error (2000-10-03),

4. 5991251 - Method and apparatus for changing laser beam power of an optical storage (1999-11-23),

5. 5926451 - Optical disk unit having reduced wobble (1999-07-20),

6. 5875155 - Optical disk unit having reduced recording and reproducing errors (1999-02-23),

7. 5737292 - Optical data recording/reproducing device (1998-04-07),

8. 5668793 - Disk cartridge driving apparatus (1997-09-16),

9. 5392274 - Optical pickup device (1995-02-21),

10. 5086422 - Optical disk apparatus (1992-02-04),

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