Combined keypad and protective cover

Details Combined keypad and protective cover Combined keypad and protective cover

1996-08-02

1998-10-06

Zele, Krista

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379388, 379420, 455575, H04M 900

Patent

active

058189246

ABSTRACT:
A mechanical keypad is attached to the outside of a protective cover. A switch allows a personal intelligent communicator to be operated either with the user interface of a mobile telephone handset or with a graphical user interface. When the cover is closed, the mechanical keypad serves for dialing telephone numbers. When the cover is open, the mechanical keypad is disabled, and the graphical user interface is revealed. The microphone and speaker of the personal intelligent communicator together operate as a speaker phone when the cover is open, and as a mobile telephone handset when the cover is closed. By use of an override switch, the personal intelligent communicator can also operate as a speaker phone when the cover is open.

REFERENCES:
patent: 4763356 (1988-08-01), Day, Jr. et al.
patent: 5189632 (1993-02-01), Paajanen et al.
patent: 5257310 (1993-10-01), Takagi et al.
patent: 5303291 (1994-04-01), Takagi et al.
patent: 5526411 (1996-06-01), Krieter
patent: 5625673 (1997-04-01), Grewe et al.

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