Emergency cellular radiotelephone and method therefor

Details Emergency cellular radiotelephone and method therefor Emergency cellular radiotelephone and method therefor

1993-02-19

1995-11-07

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 541, 455 561, 455 581, 379 59, H04Q 720

Patent

active

054653886

ABSTRACT:
An emergency portable cellular radiotelephone (10) communicates with the one of A and B cellular systems that offers the best signalling. The radiotelephone may be energized from an internal battery (50) or an external power source (62). A single switch (38) is used to instigate emergency communication services. When a signalling channel is available and the switch (38) is activated, the radiotelephone (10) requests the placement of a call to a "911" phone number. Once the call is established, it may not be terminated at the radiotelephone (10), other than by removing power.

REFERENCES:
patent: 3906166 (1975-09-01), Cooper et al.
patent: 4176254 (1979-11-01), Tuttle et al.
patent: 4724538 (1988-02-01), Farrell
patent: 4742560 (1988-05-01), Arai
patent: 4788711 (1988-11-01), Nasco, Jr.
patent: 4860341 (1989-08-01), D'Avello et al.
patent: 4903320 (1990-02-01), Hanawa
patent: 4916728 (1990-04-01), Blair
patent: 5020091 (1991-05-01), Krolopp et al.
patent: 5159625 (1992-10-01), Zicker
patent: 5228074 (1993-07-01), Mizikovsky
patent: 5301359 (1994-04-01), Van den Heuvel et al.

Affiliated with

Also associated with

Rating

Emergency cellular radiotelephone and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Emergency cellular radiotelephone and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergency cellular radiotelephone and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-203240