The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1992
Filed:
Sep. 11, 1991
Applicant:
Inventors:
Thomas M Schnorr, Wolfenbuttel, DE;
Jurgen G Hannemann, Seelze, DE;
Assignee:
Philips and Du Pont Optical Company, Nieuwegein, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369270 ; 369271 ;
Abstract
Device for holding an optically readable disc in a flat position during playing has concentric annular depressions to which vacuum is supplied by a passage to a rotatably journalled connection having an airtight lead-through.