Push-button matrix

Details Push-button matrix Push-button matrix

1999-12-14

2001-03-20

Asch, Jeffrey (Department: 2913)

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Design Patent

active

D0439244

CLAIM:
The ornamental design for a push-button matrix, as shown and described.

REFERENCES:
patent: D. 237802 (1975-11-01), Klaiber
patent: D. 364170 (1995-11-01), Tobish
patent: D. 403683 (1999-01-01), Russell
patent: 4386245 (1983-05-01), Nimura et al.
Tele, Swedish publication, pp. 34 & 38, Jan. 1982.

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