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:
Mar. 20, 1990
Filed:
Oct. 17, 1986
Jerome Drexler, Los Altos Hills, CA (US);
Joseph B Arnold, Los Altos Hills, CA (US);
Drexler Technology Corporation, Mountain View, CA (US);
Abstract
A method of recording data on a card in which track indicia are laser recorded by a user on at least one end of a card prerecorded with tracks only. Track indicia include start and stop marks defining usable recordable areas, synchronization marks, error codes and track numbers and track termination codes. Start and stop marks may be series of lines recorded in a pattern across the tracks and in addition to demarcating usable recordable areas of the card may indicate the location of track numbers and data areas as well as the particular encoding scheme used on the card. Data blocks may be written on entire tracks or in sectors. When recording errors are detected, the data block is rewritten in a new sector or on another track using the same track number.