Access security control terminal

Details Access security control terminal Access security control terminal

1988-03-14

1990-08-28

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14100

Patent

active

D03102114

REFERENCES:
patent: D277170 (1985-01-01), Sugiyama et al.
patent: D292404 (1987-10-01), Wilson et al.
patent: 4115870 (1978-09-01), Lowell
patent: 4599509 (1986-07-01), Silverman et al.
patent: 4602150 (1986-07-01), Nishikawa et al.
patent: 4602151 (1986-07-01), Hellsberg
patent: 4684791 (1987-08-01), Bito
patent: 4798945 (1989-01-01), Bruckner et al.
patent: 4800255 (1989-01-01), Imran
patent: 4804826 (1989-02-01), Hertzen et al.

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