Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1989-11-20
1992-12-29
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 61, 379 63, 455 89, 381 43, H04M 1100
Patent
active
051757591
ABSTRACT:
A portable radiotelephone with a keypad, alphanumeric character display, and hands free function is disclosed. A movable flip element of the housing covers a keypad and other control buttons when in a closed, on-hook, position and activates the illumination of the keypad, enables the display, and enables the hands free function when in an open, off-hook, position. The duration of keypad illumination and display activation are timed to reduce battery drain and the hands free function may be deactivated with a hookswitch flash.
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Krolopp Robert K.
Metroka Michael P.
Cumming William
Hackbart Rolland R.
Jenski Raymond A.
Kuntz Curtis
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