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:
Nov. 27, 2001
Filed:
Jun. 07, 1999
Yoshitaka Kawanishi, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A recording film has recording tracks that record information and separating regions that separate neighboring recording tracks. A recording film reflects light when performing recording, playback, and erasing of information. A protective film has a pattern of surface unevenness that corresponds with the recording racks and separating regions, and has a thickness at a recording track whereby there is a change in reflectivity of the reflective film depending upon whether or not there is information recorded, and a thickness at the separating regions such that reflectivity does not depend upon whether information is recorded.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile