Tabular guide decrypting apparatus

Details Tabular guide decrypting apparatus Tabular guide decrypting apparatus

1991-06-28

1992-11-24

Cangialosi, Salvatore

Cryptography

By modifying optical image

H04K 100

Patent

active

051669803

ABSTRACT:
A decryption apparatus for use in correlating broadcast designations associated with tabular programming schedules to numerical channel designations corresponding to television channel selection apparatus. The decryption apparatus includes a plurality of generally transparent surfaces and a plurality of less transparent surfaces. The decryption apparatus may also include one or more generally opaque registration surfaces to facilitate alignment of the decryption apparatus with a tabular programming schedule to facilitate use thereof.

REFERENCES:
patent: 2952060 (1960-09-01), Avakian et al.
patent: 3227474 (1966-01-01), Hoeflinger
patent: 3621589 (1971-11-01), Jones et al.
patent: 4334771 (1982-06-01), Ryan, Jr.
patent: 4512581 (1985-04-01), Levine
patent: 4912761 (1990-03-01), Tan et al.
patent: 4916739 (1990-04-01), Iggulden et al.
Tabular Programming Schedule published in TV Week of the Houston Post, published on or about Apr. 14, 1991.

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