Class 379/180 - Full selective or tuned (e.g., harmonic)

Subclass of Class 379 - Telephonic communications
Definition: Subject matter which uniquely directs the ringing signal
No. of patents: 24
Last issue date: 04/11/2006

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Number	Title	Issue Date
7027569	Telephone call screening system and method and caller registration system and method for use therewith A telephone call screening system screens telephone calls placed to a subscriber based upon a preferred caller database established by the subscriber from a networked caller registry database. A caller registration system allows callers to select a private identifie...	04/11/2006
6903841	Decorating system for edible items A system for creating a decorative edible item from a selected image. The system includes at least one image source, such as a scanner and/or a library of stored images, a controller unit and a printer. An edible media is inserted into the printer. The user then sel...	06/07/2005
5461670	Telephone subscriber system incorporating a drive interface for a telephone line switch at a different reference potential A telephone subscriber system comprising a speech circuit and a ring circuit adapted to be integrated monolithically to a semiconductor material substrate and being coupled to a telephone subscriber line, respectively through first and second circuit swit...	10/24/1995
5446784	Apparatus for coupling a telephone line to a telephone line subscriber device The telephone line has a multiple ringing patterns capacity, and the apparatus couples the telephone line to the telephone line subscriber device when a particular one of the ringing patterns is present at the telephone line. The particular ringing patter...	08/29/1995
5333190	Telephone ring detection method and apparatus A ring detection device adapted to be connected in a telephone line to a telephone or telephone device. The device includes circuitry for distinguishing between several differently encoded telephone ring signals and enabling and/or maintaining disablement...	07/26/1994
5253289	Terminal connection device A terminal connection device changes and connects a plurality of terminals to one telephone line according to kinds of ringing signal sequences sent through the telephone line. The terminal connection device comprises switches connecting between the telep...	10/12/1993
5247570	Telephone answering system and apparatus for direct caller selection of a party line extension An automated telephone answering system with plug-in tone responsive unit at each of a plurality of extensions, a central answering unit responds to a caller initiated, telephone company generated, ring signal on the telephone line and establishes a conne...	09/21/1993
5086458	Telephone answering system and apparatus for direct caller selection of a party line extension With a plug-in tone responsive unit at each extension, a central answering unit responds to a caller initiated, telephone company generated, ring signal on the telephone line and establishes a connection with the calling phone. Each of the remote units re...	02/04/1992
4998273	Telephone line called number recognizer A party-like telephone line with plural numbers having distinguishable ringing signals on a single line is automatically connected to a facsimile or other telephone connected device for receiving incoming messages upon sensing a predetermined ring sequenc...	03/05/1991
4985916	Party line converter A telephone subscriber interface device provides privacy on a party line. The device provides for revertive calling, break-in, automatic disconnect, selective ringing, automatic number identification, and operates on the central office power supply. The d...	01/15/1991
4959853	Frequency responsive selective ringing circuit A frequency responsive selective ringing circuit detects a selected one of a plurality of frequency-distinctive ringing signals applied on either the tip or ring conductors of a telephone line, distinguishes between the respectively different frequencies ...	09/25/1990
4701949	Frequency responsive party telephone line selection apparatus and method An apparatus adapted to be coupled into a party telephone line for selecting a ringing signal transmitted on the line from among a plurality of possible coded ringing signals that could be transmitted on the line and for coupling the ringing signal to a t...	10/20/1987
4675899	Frequency ring director A device for selectively ringing a specific party in a multiparty telephone system by frequency discrimination including a remotely actuable solid state switch connected in series with the telephone circuit of each customer. A programmable frequency discr...	06/23/1987
4653093	Frequency selective ringer circuit A frequency selective ringer circuit which utilizes a constant current source in conjunction with an array of resistors and switches for developing a frequency selective window with which to detect an incoming frequency at the tip and ring inputs of a tel...	03/24/1987
4567330	Interface for connecting standard telephones to party lines A party line interface for permitting connection of a standard two-wire telephone designed for non-party line use to a party line system which rings subscribers by party line ringing signals of different frequencies. The interface includes circuitry for g...	01/28/1986
4513415	Broadcast synchronization and supervision system A system is disclosed which employs existing broadcast stations to transmit synchronizing and supervisory signals for use by telephone communication devices at remote locations for timing purposes and for coordinating their activities with activities at o...	04/23/1985
4406004	Ring scheduling apparatus for a digital multiplexed telecommunication system A ring scheduling apparatus for use in a digital multiplexed telephone communication system. The apparatus utilizes a controller which sorts messages indicating which telephone lines are being rung and what frequency and DC signal level are required to ri...	09/20/1983
4310723	Party line apparatus Privacy and selective ringing in a two-party line system are implemented by using unidirectional diodes in the speech circuit and the ringer circuit, respectively, of the subscriber instruments. The diodes in the first subscriber instrument are oppositely...	01/12/1982
4282410	Ringing signal generator A telephone ringing signal generator which sequentially produces a plurality of ringing signals each of a different frequency. Each of a plurality of tone ringers connected to the generator will ring only in response to it's particular frequency. A progra...	08/04/1981
4221935	Control circuit for telephone subscriber station A control apparatus for providing added service telephone features for stations of a multiple party line. Features provided are automatic number identification, party line privacy, fully selective ringing, remote station verification and disconnect and re...	09/09/1980
4192007	Programmable ringing generator An apparatus for generating a selected one of a plurality of ringing frequencies utilizing a single frequency source. A first counting means is utilized to divide the source frequency by a first predetermined integer to generate a series of address signal...	03/04/1980
4056694	Telephone ringing detectors A telephone ringing signal detector is disclosed for detecting four-party fully selective superimposed ringing signals on a telephone line. Detecting these signals at the central office end of a subscriber loop carrier system permits encoding the ringing ...	11/01/1977
4048448	Multiparty telephone ringing A subscriber loop carrier system using digital multiplex techniques is disclosed in which remote subscriber loops include multiparty lines. Four party fully selective ringing signals are detected at the central office terminal of the system and converted ...	09/13/1977
3993875	Tone receiver A tone receiver for connection to a telephone line at the station end for responding to a predetermined tone frequency in which the receiver has a multiple frequency selectable channel for allowing the receiver to respond to only one of a plurality of inp...	11/23/1976

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Class 379/180 - Full selective or tuned (e.g., harmonic)