Company Filing History:

5 out of 42,485

Hitachi, Ltd.

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),

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Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.

For the Inventor, By the Inventor

Masateru Watanabe

Location History:

Company Filing History:

Years Active: 1988-2001