Combined door speaker and receiver with answering machine

Details Combined door speaker and receiver with answering machine Combined door speaker and receiver with answering machine

1996-10-15

1997-10-14

Jackson, Marcus A.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

D14141, 1005

Patent

active

D03849023

REFERENCES:
patent: D275088 (1984-08-01), Kachi et al.
patent: D316262 (1991-04-01), Kikutani
patent: D316264 (1991-04-01), Levy
patent: D321348 (1991-11-01), Harden et al.
patent: D326238 (1992-05-01), Spinosa

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