Listening center

Details Listening center Listening center

1994-08-29

1996-08-06

Morris, Sandra L.

Recording, communication, or information retrieval equipment

Miscellaneous

Patent

active

D03724824

REFERENCES:
patent: D84560 (1931-07-01), Angelus
patent: D241856 (1976-10-01), Williams
patent: D243620 (1977-03-01), Williams
patent: D255193 (1980-06-01), Heitz
patent: D285392 (1986-09-01), Thompson
patent: D309142 (1990-07-01), Swinburne

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