Method and apparatus for verifying postage

Details Method and apparatus for verifying postage Method and apparatus for verifying postage

1984-03-12

1987-03-10

Trafton, David L.

Registers

Record controlled calculators

With printing

235494, 364464, G06F 1512

Patent

active

046492666

ABSTRACT:
Indicia having an encrypted number that is stamped upon a mail piece representative of postage so as to provide a code for authentication of such postage.

REFERENCES:
patent: 3798360 (1974-03-01), Feistel
patent: 3824375 (1974-07-01), Gross et al.
patent: 3859508 (1975-01-01), Brosow et al.
patent: 3890599 (1975-06-01), Simjian
patent: 3956615 (1976-05-01), Anderson et al.
patent: 3978457 (1976-08-01), Check et al.
patent: 3985998 (1976-10-01), Crafton
patent: 3990558 (1976-11-01), Ehrat
patent: 4024380 (1977-05-01), Gunn
patent: 4253158 (1981-02-01), McFiggans
patent: 4376299 (1983-03-01), Rivest

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