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:
Apr. 13, 1993
Filed:
Jul. 07, 1992
Wolfram Kocznar, Innsbruck, AT;
Kurt Wallerstorfer, Strasswalchen, AT;
Skidata Computer Gesellschaft m.b.H., St. Leonard-Gartenau, AT;
Abstract
For automated communication in a limited acquisition space, for example in order to identify or check an access authorization, use is made of active data supports which comprise a transmitter (15), a receiver (16), a read-write memory, an electric clock, a computer, a display and a power source (7). The checking station is also provided with a transmitter-receiver to check and possibly modify the data. Each transmitter-receiver has a limited communication space, of which the maximum extent is less than the minimum extent of the acquisition space. In this way it is not necessary to plug in the data support, of which a precise point must, however, be deliberately brought close to the checking station. In this way a definite coordination between the checking station and a further data support is prevented.