Automatic handset-speakephone switching arrangement for portable

Details Automatic handset-speakephone switching arrangement for portable Automatic handset-speakephone switching arrangement for portable

1992-04-01

1993-06-29

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 56, 379 61, 379388, 379420, H04M 1100

Patent

active

052241513

ABSTRACT:
A personal communicator handset is designed to operate as both a handset and as a speakerphone and to automatically switch between the two modes based on distance between the handset and the user's ear. This distance is determined by an infrared range detection unit built into the handset.

REFERENCES:
patent: 3109893 (1961-01-01), Burns
patent: 5010566 (1991-04-01), Seo
"The Sharper Image" catalog advertisement for `One-Line Cordless Phone`, Jun. 1987, p. 46.
SONY.COPYRGT. Cordless Telephone, "SPP-100" Owner's Record, 1985, pp. 1-12.

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