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:
Jun. 27, 1978
Filed:
Sep. 01, 1977
Bryan D Ulch, Valencia, CA (US);
A-T-O Inc., Willoughby, OH (US);
Abstract
A card or badge is used for controlling access to facilities or facility areas which include remote card readers which are interconnected with a central card data processor. When access is requested at a remote location, a user inserts his card or badge into the remote terminal and the remote terminal sends data identifying the person to the central processor which, in turn, sends a command to the remote terminal to grant or deny access. When a card or badge is inserted into the system and no response is received within a predetermined time period, the remote terminal, on the assumption that communication line failure has occurred between the remote terminal and the central processor, reads a set of data from the user's card or badge to grant or deny facility access to the user on a secondary selection basis.