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US 7,031,667 B2Granted
Portable telephone
AssigneeNEC Corporation
InventorMasuyo Horiguchi
Life of this patent
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AssigneeNEC Corporation
InventorMasuyo Horiguchi
Estimating the term…
The portable telephone is provided with an antenna serving as both transmitting and receiving antennas, a radio unit composed of a transmitter and a receiver, a display for displaying telephone numbers, an interchanging key for interchanging functional modes, a key-operating unit including numerical keys, and a control unit. A communicative mode related to a telephonic communication and a noncommunicative mode (a mode unrelated to communication) are selected alternately in accordance with an operation of the interchanging key. When the noncommunicative mode is selected, the radio unit stops functioning and a noncommunicative mode indicating lamp lights up to notify persons around the portable telephone that it is functioning in the noncommunicative mode. According to the aforementioned structure, the persons around the portable telephone will permit a user to use it in the noncommunicative mode.
A portable telephone functioning in a communicative mode in which said portable telephone drives a radio unit provided therefore to be in communication with other portable telephones or with fixed telephones through a telephone network, or in a noncommunicative mode in which said portable telephone functions for purposes unrelated to its communication function, comprising:
A portable telephone functioning in a communicative mode in which said portable telephone drives a radio unit provided therefor to be in communication with other portable telephones or with fixed telephones through a telephone network, or in a noncommunicative mode in which said portable telephone functions for purposes unrelated to its communication function, comprising:
Dependencies are inferred from the claim text.