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. 02, 1993
Filed:
Jun. 29, 1989
Neville K Lee, Sherborn, MA (US);
Paul H Schmidt, West Boylston, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
An optical data storage medium has, on one face, a recording track and a non-recording track for high-density magneto-optical recording. The media is manufactured by sputtering magnetic material onto a surface with alternating tracks of rough and smooth textures. Alternatively, the media may be manufactured by depositing a coating of hydrogenated carbon composition and exposing the coating to ion bombardment, or by sputtering or angular deposition of magnetic material onto a corrugated surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile