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:
Feb. 19, 1980
Filed:
Sep. 08, 1978
Applicant:
Inventors:
Ivor Brodie, Palo Alto, CA (US);
John Kelly, Palo Alto, CA (US);
Assignee:
Stanford Research Institute, Menlo Park, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365128 ; 365 96 ; 365127 ; 1791 / ; 3581285 ;
Abstract
A mass data storage arrangement such as for books, is provided, by recording the data in the form of one micron pits in radial rows within spiral grooves of a disc. A reading element comprises a CRT providing a light beam output, which is focused down to one micron in size. The spot output of the CRT is scanned across each row having the presence or absence of pits. The light reflected from the disc is modulated by the presence or absence of pits and is reflected to a photomultiplier. The output of the photomultiplier is decoded and then displayed in human language form.