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:
May. 10, 1994
Filed:
Feb. 26, 1992
Applicant:
Inventor:
Toshio Horiguchi, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
3692751 ; 3692753 ; 369 47 ; 380 23 ;
Abstract
An optical card apparatus including a recording device for recording in each of a plurality of data blocks in a card-like recording medium user data to be recorded along with data protecting information inhibiting the user data from being carelessly read out, and a reproducing device for reproducing the user data and data protecting information recorded in the recording medium. A data transfer controlling device for permitting the user data to be read out only in case the input secret information data coincide with the data protecting information recorded in the recording medium in the case of reproducing the user data with this reproducing device.