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. 30, 1999
Filed:
Sep. 12, 1995
Applicant:
Inventor:
Charles M Mecca, Jessup, PA (US);
Assignee:
WEA Manufacturing Inc., Olyphant, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
3692754 ; 369109 ; 3692755 ;
Abstract
An improved light-readable information recording disc is provided in which the optical data storage structure consists of either lands and pits or lands and bumps, in which the depth of the pits or the height of the bumps, respectively, is controlled to approximate one-half of the wavelength of the light striking the optical data storage structure. Unexpected and surprising improvements over conventional optical recording discs is achieved through increased light intensity differences detected at the changeover between pits/bumps and lands.