Telephone with a detachable key pad and method for operating it

Details Telephone with a detachable key pad and method for operating it Telephone with a detachable key pad and method for operating it

1997-06-25

1999-12-28

Isen, Forester W.

Telephonic communications

Supervisory or control line signaling

Substation originated

379 9327, 37911001, 379433, 345169, H04M 100

Patent

active

060091649

ABSTRACT:
A telephone is made up of a detachable key pad having a female connector, and a key pad receiving space formed to fit the key pad in the casing of the telephone with a male connector, wherein the female connector is connected with the male connector when the detachable key pad is inserted into the key pad receiving space.

REFERENCES:
patent: 4555600 (1985-11-01), Morse
patent: 4845748 (1989-07-01), Bohannon
patent: 4870531 (1989-09-01), Danek
patent: 5241583 (1993-08-01), Martensson
patent: 5486725 (1996-01-01), Keizer et al.
patent: 5528235 (1996-06-01), Lin et al.
patent: 5544959 (1996-08-01), Collin et al.
patent: 5563936 (1996-10-01), Washington
patent: 5583919 (1996-12-01), Talvard et al.
patent: 5793865 (1998-08-01), Leifer
patent: 5901223 (1999-05-01), Wicks et al.

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