Implement for activating and deactivating a telephone hook switc

Details Implement for activating and deactivating a telephone hook switc Implement for activating and deactivating a telephone hook switc

1985-07-18

1987-09-08

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

379448

Patent

active

D02918030

REFERENCES:
patent: D230737 (1974-03-01), Roof
patent: D239179 (1976-03-01), Haber
patent: D269433 (1983-06-01), Stein et al.
patent: D286775 (1986-11-01), Gudin
patent: 3027432 (1962-03-01), Jordan et al.
patent: 3472966 (1969-10-01), Simmons
patent: 3823277 (1974-07-01), Rudolph
patent: 4079196 (1978-03-01), Spanel
patent: 4360714 (1982-11-01), Hellwig
Telephony, vol. 73, Nov. 3, 1917, p. 44; S. Carlson Battery Cover Attachment at FIGS. 1-3.
Telephony, vol. 70, No. 16, p. 44, 4/15/1916: S. R. Automatic Battery Cut Out.

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