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US 4,542,262 AGranted
Subscriber telephone station
AssigneeLicentia Patent-Verwaltungs-G.m.b.H.
InventorGunter Ruff
Life of this patent
Estimating the term…
Abstract
A subscriber telephone station in a dial telephone network, composed of: a main subscriber instrument connected by wire into the network, a portable second instrument, and circuitry establishing wireless signal transmission and reception communication between the instruments for permitting the second instrument to be connected into the network for communication with other instruments connected to the network.
Claims8
A subscriber telephone station in a dial telephone network, comprising:
- a main subscriber instrument connected by wire into the network, said main subscriber instrument including an automatic dialing device;
- a portable second instrument, said portable second instrument including
- a keyboard;
- a display;
- and
- an electronic timing device packaged with said keyboard and display in the form of a watch, said electronic timing device being coupled to said keyboard and display to provide switchable alarm and pocket calculator functions, a phone number to be called, an alarm time and numbers and operations for calculator functions being inputted into said electronic timing device by means of said keyboard;
- and
- communications means employing a medium consisting of one of radio, ultrasound and light energy for establishing wireless signal transmission and reception between said main subscriber instrument and said portable second instrument for connection of said second instrument into said network for communication with other instruments connected to said network, said communications means operating at a plurality of selectable operating frequencies and media whereby adjacent subscribers are provided with at least one of different, fixed operating frequencies and media.
5 more elements
A subscriber telephone system in a dial telephone network, comprising:
- a plurality of main subscriber instruments connected by wire into the network, said main subscriber instruments each including an automatic dialing device;
- a plurality of portable second instruments, each said portable second instrument being associated with a respective one of said main subscriber instruments and including:
- a keyboard;
- a display;
- an electronic timing device packaged with said keyboard and display in the form of a watch, said electronic timing device being coupled to said keyboard and display to provide switchable alarm and pocket calculator functions, a phone number to be called, an alarm time and numbers and operations for calculator functions being inputted into said electronic timing device by means of said keyboard;
- and
- communications means employing a medium consisting of one of ratio, ultrasound and light energy for establishing wireless signal transmission and reception between each said main subscriber instrument and the said associated portable second instrument for connection of said associated second instrument into said network for communication with other instruments connected to said network, said communications means operating at a plurality of selectable operating frequencies and media whereby adjacent subscribers are provided with at least one of different, fixed operating frequencies and media.
4 more elements
Dependencies are inferred from the claim text.