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Chigasaki, Japan

Masateru Watanabe

This inventor holds 6 USPTO granted patents. Top assignees: Hitachi, Ltd., Hirachi, Ltd.. Active years: 1988-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masateru Watanabe. Retrieved from https://idiyas.com/inventor/masateru-watanabe

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 5

Forward Citations = 80(Granted Patents)

Location History:

Kanagawa, JP (1988 - 1991)
Chigasaki, JP (1989 - 2001)

Company Filing History:

5 out of 42,740

Years Active: 1988-2001

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6320836 - Apparatus for ensuring operational clearance between a rotating disc type medium and a disc cartridge enclosing the medium (2001-11-20),

2. 5418763 - Disc recording system (1995-05-23),

3. 5172362 - Recording medium loading mechanism (1992-12-15),

4. 5016237 - Prism optics stable with respect to wavelength and temperature (1991-05-14),

5. 4807212 - Correcting for comatic aberration in an optical head of an optical disk (1989-02-21),

6. 4742218 - Focus error detection apparatus utilizing focusing an front and rear (1988-05-03),

I specialize in innovations, inventions, inventors, patent attorneys, assignees, and patents.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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