Combined telephone index and amplifier

Details Combined telephone index and amplifier Combined telephone index and amplifier

1983-01-19

1986-01-14

Word, George P.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Holder or file

D14 57

Patent

active

D02821796

REFERENCES:
patent: D152922 (1949-03-01), Shipton
patent: D232867 (1974-09-01), Se-Kit
patent: D247174 (1978-02-01), Janda
patent: D259885 (1981-07-01), Halm
patent: D269432 (1983-06-01), Kowalik et al.
patent: D272636 (1984-02-01), Se-Kit

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