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. 10, 1991
Filed:
Jul. 18, 1989
Applicant:
Inventor:
Larry S Zurbrick, San Jose, CA (US);
Assignee:
Drexler Technology Corporation, Mountain View, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G11B / ;
U.S. Cl.
CPC ...
235488 ; 235487 ; 235494 ; 3692753 ;
Abstract
A data storage medium having a pattern representing data bits arranged in a plurality of interlocked triangularly shaped tracks. The medium may be a prerecorded optical storage material having a set of optically contrasting marks arranged in the tracks. The track width increases from a start point to an end point at a constant rate that depends on the maximum allowable angle of skew. The medium, which can be prerecorded with the pattern using exposure to actinic radiation through a like-patterned master, can have either a card, tape or drum format.