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:
Feb. 21, 1989
Filed:
Jul. 25, 1986
Hans-Peter Liechti, Lanzenhausern, CH;
Ascom Hasler AG, Bern, CH;
Abstract
The present invention provides a method for releasing and for controlled storage of a desired predetermined value into a preset value memory storage of a postage metering machine. Initial values are transmitted in each case from a postage metering machine to a release apparatus. A first key code word is determined by a first algorithm module section from initial values and from values stored in a first memory storage associated with the postage metering machine. A second key code word is determined by a second algorithm module section from initial values and from values stored in a visually readable table associated with a second memory storage in the release apparatus. The second key word is transmitted from the release apparatus to the postage metering machine, where it is stored in a storage memory section and compared with the first key word in a locked section of memory. A random number is generated in a random number generator in the postage metering machine and is transmitted to the release apparatus, where it is stored in the memory storage of the second algorithm module section as a seed value for a future transmitting of a second key word. The random number is stored in the memory storage of the first algorithm module section as a comparison value for a future unlocking.