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| Number | Title | Issue Date |
| 7616759 | Telephone line switching device A switching device for providing selective telephone access to multi-telephone line and data line sources. The device can be incorporated within a compatible device or configured as a stand-alone, self-contained device. In the later configuration, it includes a hous... | 11/10/2009 |
| 7433715 | Mobile station for telecommunications system A mobile telecommunications system has a handset and a headset for connection to the handset. The handset includes an RF transceiver for transmitting an outgoing call and receiving an incoming call, and a processor coupled to the RF transceiver that provides audio s... | 10/07/2008 |
| 5455468 | Switching circuit for switching a plurality of lines This invention enables the number of required ports on a CPU to be reduced, in a switching circuit detecting any exchanged contact point out of plural points having more than three points. In a switching circuit enabling one line to connect to any one of ... | 10/03/1995 |
| 5177783 | Switching circuit in a telephone device for selecting between two-line and keysystem modes of operation In a telephone answering machine, means are provided for selecting one of three operating modes. In mode 1, the answering machine answers telephone calls connected via the tip and ring terminals, and does not place a low impedance across the A and A1 term... | 01/05/1993 |
| 5014302 | Telephone The invention relates to telephones that have a base and two handsets or one handset and a base acting as a second handset and which are adapted to be connected to two or more telephone lines. Unlike known telephones designed to be connected to a set numb... | 05/07/1991 |
| 4817138 | Telephone having a handset and a rase each having a receiver and microphone The telephone comprises a handset (8) having a receiver and a microphone, and a base (2) on which the handset may be placed. According to the invention, the casing (28) of the base is fitted with another receiver and another microphone and has a shape suc... | 03/28/1989 |
| 4773089 | Telephone line-switching device A telephone line-switching device comprises first and second switches that interlock and a lock plate extending between the two switches. The push member of the first switch has a cam with which the lock plate usually engages. The push member of the secon... | 09/20/1988 |
| 4536621 | Dual talk path key telephone In a multiple talk path key telephone of the type of having multiple handsets, each handset is coupled to the key field for a predetermined short period of time when it is initially taken "off hook". During this predetermined time period a user can depres... | 08/20/1985 |
| 4374308 | I-Use indication in a telephone keyset A telephone keyset is disclosed which has a dialpad of dialing keys, a series of line keys, at least one function key and a telephone receiver hook switch. Each of the line keys is provided with a lamp, such as an LED, for indicating when the telephone li... | 02/15/1983 |
| 4349705 | Lighted telephone dial A pushbutton dial having pushbuttons arranged in three columns and four rows has the buttons illuminated by four LED's positioned in a light-guide plate having apertures which surround the pushbuttons. The LED's are in recesses at intersections of the out... | 09/14/1982 |
| 4342883 | Pushbutton switch assemblies for telephone sets A pushbutton array, connector block and a connector, for mounting in a telephone set base, are mounted on and interconnected by a flexible printed circuit member, by connection pins on each item passing through the circuit member and wave soldered. The fl... | 08/03/1982 |
| 4243847 | Automatic restoral mechanism for a pushbutton key telephone instrument A mechanism for automatically restoring an operated and depressed pushbutton line key in a multi-line key telephone instrument. When the telephone instruments handset is returned to the instruments cradle, the cradle rotates a cradle shaft which in turn r... | 01/06/1981 |
| 4133985 | Key telephone system To convert a multiple line, multiple telephone set installation into a key telephone system, a control unit is provided at each telephone set. The control unit includes a regulated power supply, a control circuit, pushbutton line select and hold switches,... | 01/09/1979 |
| 4028502 | Apparatus for adapting multi-line telephone instrument for use by the blind Apparatus for providing auditory and tactile recognition of a light signal associated with a line-selector pushbutton of a multi-line telephone instrument. A photocell is provided for sensing the light signal. An oscillator generates a sine wave voltage w... | 06/07/1977 |
| 4004106 | Line circuit for use with a key telephone system There is provided a line circuit for connection to a key telephone system for indicating an incoming call, a call placed on hold, and an answered call. There is further provided a means for automatically indicating that the incoming call has been placed o... | 01/18/1977 |
