Radio telephone set used as portable set and vehicle-mounted set
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 9, 1990
Grant Date -
N/A
app pub date -
Jan 30, 1989
filing date -
Jan 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio telephone set comprises switch circuitry, a telephone circuit and a battery for portable operation, which battery may be a built-in battery. When the radio telephone set is not mounted on a vehicle, the switch circuitry is not connected to a battery of the vehicle and feeds power from the built-in battery to the telephone circuit. Thus, the radio telephone set can be used as a portable set. When the radio telephone set is mounted on the vehicle, the switch circuitry is connected to the vehicle battery and this connection causes the automatic switching of the power supply to the telephone circuit from the built-in battery to the vehicle battery. Thus, the radio telephone set can be used as a vehicle-mounted, or onboard, set.
First Claim
Family
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Cited Art Landscape
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