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:
Jul. 14, 1992
Filed:
Nov. 07, 1989
Applicant:
Inventor:
Minemasa Ohta, Yamanashi, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369100 ; 369 50 ; 369 54 ; 369 59 ; 369109 ; 369116 ;
Abstract
Apparatus and method for forming pits in an optical disk and the resulting disk. The preformed pits in the disk are adjusted to suppress the hump phenomenon by adjusting the amplitude and duty cycle of the standard modulating pulses. The amount of adjustment depends upon the duration of the standard pulses applied.