Socket/plug in DTMF tone dialer

Telephonic communications – Call signal generating

Reexamination Certificate

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Details

C379S355010, C379S355060

Reexamination Certificate

active

06961425

ABSTRACT:
A system for generating number tones for dialing a telephone device. The system comprises a socket assembly, at least one button assembly, and a converter. The socket assembly defines at least one socket. Each button assembly comprises a memory device for storing a sequence of numbers and a switch device. The converter generates a DTMF signal comprising a sequence of DTMF tones. Operation of the switch device causes the converter to generate the DTMF signal based on the sequence of numbers stored by the memory device. The socket assembly electrically connects the converter to the telephone device.

REFERENCES:
patent: 4103115 (1978-07-01), Milkes
patent: 4980910 (1990-12-01), Oba et al.
patent: 5583919 (1996-12-01), Talvard et al.
patent: 5583933 (1996-12-01), Mark
patent: 5859896 (1999-01-01), Rosen
patent: 5901217 (1999-05-01), Kanbar
patent: 6049604 (2000-04-01), Lin
patent: 6118867 (2000-09-01), Ban
patent: 6169799 (2001-01-01), McIntosh
patent: 6240175 (2001-05-01), Barber
patent: 2231006 (1997-03-01), None

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