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. 08, 1987
Filed:
Dec. 03, 1985
Motohiro Gotanda, Nakabyo, Abiko-shi, Chiba-ken, JP;
Other;
Abstract
A door lock control system including keys each having a memory storing information of the key number and the key owner's face as video data. When the key is inserted into the door lock, the face image is reproduced on a CRT according to the face information stored in the key. A TV camera also takes the face image of the key handling person for displaying same on another CRT so that one can judge, by comparison of the face images on CRT, whether the person is the same as the key owner. The system further includes a central storage unit in which a portion of the video data in each key is stored as a collation word. Upon insertion of the key into the door lock, the collation word is read out according to the information of the key number stored in the key. The read out word is compared with the portion of the video data stored in the key to check whether the key is one of those owned by the predetermined key owners.