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:
Dec. 23, 1980
Filed:
Oct. 26, 1978
Applicant:
Inventors:
Kazuo Shigematsu, Kawasaki, JP;
Keizo Kato, Hachioji, JP;
Toshimitsu Miyauchi, Hachioji, JP;
Seiji Yonezawa, Hachioji, JP;
Fumiyuki Inose, Kokubunji, JP;
Kimio Tatsuno, Kokubunji, JP;
Takeshi Maeda, Kokubunji, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; G11B / ;
U.S. Cl.
CPC ...
1791 / ; 3581285 ; 360 722 ; 346 / ;
Abstract
An optical information recording and reproducing apparatus is disclosed in which a predetermined signal is recorded on a track of a rotating recording medium by a recording light beam and the recorded information is reproduced by a reproducing light beam. The information recorded on the last record track is reproduced by the recording beam and the reproducing beam and radiating position of the recording beam on the recording medium is displaced by a predetermined distance from the last record track.