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. 31, 1991
Filed:
Nov. 21, 1990
Applicant:
Inventors:
Sei Onishi, Saitama, JP;
Atsushi Kurosawa, Saitama, JP;
Kiyoshi Morikawa, Saitama, JP;
Kaoru Takemasa, Saitama, JP;
Kiyohito Kajihara, Saitama, JP;
Osamu Kitazawa, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11C / ;
U.S. Cl.
CPC ...
369 36 ; 369 34 ; 369 752 ; 369 771 ; 360 92 ;
Abstract
A CD player has a magazine containing a plurality of trays each of which is provided for mounting a CD, and a moving device for moving one of the CDs between the magazine and a playback position. Switches are provided for producing CD position signals each of which represents a CD position on a path of the moving tray, and a photosensor is provided for detecting the CD passing the CD position informed by said CD position signal. A display indicates whether the CD exists on the tray.