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| Number | Title | Issue Date |
| 5946378 | Information on hold telephony service An on hold telephone service that allows a subscriber to the service to place a call on hold and make information services available to the party placed on hold. The on hold service can be implemented on a central office switch or an enhanced services pla... | 08/31/1999 |
| 5875231 | Telephone call on hold service for a party placed on hold by another party An on hold telephony service that allows a party placed on hold, if he is a subscriber to the service, to also place the call on hold and then hang up. The on hold service can be implemented on a central office switch or an enhanced services platform conn... | 02/23/1999 |
| 5828735 | Games on hold telephony service An on hold telephony service that allows a subscriber to the service to place a call on hold and make interactive games available to the party placed on hold. The on hold service can be implemented on a central office switch or an enhanced services platfo... | 10/27/1998 |
| 5727057 | Storage, transmission, communication and access to geographical positioning data linked with standard telephony numbering and encoded for use in telecommunications and related services A method and system implementation for combining and accessing telephony numbering and geographical position so direct access to information, services and goods may be invoked through the use of various telephone networks. The existing telephone networks ... | 03/10/1998 |
| 5633634 | Data rate conversion circuit A data conversion circuit that acts as an interface between components or systems having different data input/output rate requirements. A circuit reads data transmitted at one bit rate and transmits data consisting of the input data along with overhead da... | 05/27/1997 |
| 5542070 | Method for rapid development of software systems Two major Forth extensions provide high-level support for building rapid prototypes for systems. These extensions form distinct language vocabularies available in the Forth environment. One is a Finite State Machine Language, named FSML, and the other is ... | 07/30/1996 |
| 5519764 | Circuit and method for detecting error causing tones in a voice messaging system A computer scans the voice messages for phrases that will be detected as DTMF digits and creates a record of where, when and for how long the possible problem maybe occurring. This allows prerecorded or synthesized messages from a Voice Response Announcem... | 05/21/1996 |
| 5426649 | Test interface for a digital circuit A test interface is disclosed that is added to a digital circuit device for providing a way of easily verifying that the device's input and output circuits are operating and connected properly. The arrangement implements a test mode in which a simple exer... | 06/20/1995 |
| 5420894 | Elastic storage circuit A circuit which synchronizes the phase of a data stream from a transmitting system, to the phase of the clock signal of the receiving system. Two frames of data from the transmitting data stream are stored in a memory which is continuously updated as the ... | 05/30/1995 |
| 5378545 | Removable snap-on card stiffener A removable stiffener, which is made of titanium so that it will not be wetted by solder, consists of a thick, straight center member with wedge-shaped feet evenly spaced along its length. A latching pin is included on one end. The stiffener also includes... | 01/03/1995 |
| 5367761 | Printed circuit board assembly extractor tool The Printed Circuit Board Assembly Extraction Tool is designed to provide a method for removing Printed Circuit Board Assemblies from card file assemblies. The Extraction Tool is provided with a rubber bumper that protects the card file designation strip ... | 11/29/1994 |
| 5347575 | Circuit to detect the hook status and ringing at the CPE end of a telephone network A circuit for indicating the status of a telephone line at the CPE end, where the status is either on-hook, ringing, or off-hook is disclosed. The telephone line is the normal two-wire telephone line. First, a transconductance amplifier converts a floatin... | 09/13/1994 |
| 5323460 | Enhanced subscriber line interface circuit An enhanced subscriber line interface circuit for a digital switching system which includes a line configuration and protection circuit connection tot he subscriber line and to a thick-film hybrid module. The thick-film hybrid module comprises a high volt... | 06/21/1994 |
| 5283827 | Digital line card for interfacing a remotely located digital telephone to a central office system A digital line card for interfacing a remotely located digital telephone to a central office system by a two-wire connection is disclosed. The digital line card consists of a line interface connected to the two-wire connection. The line interface provides... | 02/01/1994 |
| 5261827 | Movable shroud center standoff In order to accomplish the object of the present invention there is provided a movable standoff for maintaining a distance between a backplane and a shroud. Several receptacles are attached to the front side of the backplane and have pins that pass from t... | 11/16/1993 |
| 5253291 | Hybrid balance and combination codec filter circuit A hybrid balance and combination codec filter circuit used in a subscriber line interface circuit over which a connection is established between a digital switching network and a subscriber instrument. The hybrid balance and combination codec filter circu... | 10/12/1993 |
| 5228081 | Ringing signal control circuit for an enhanced subscriber line interface A ringing signal control circuit used in a Subscriber Line Interface Circuit (SLIC) for connecting a ringing signal bus to a subscriber loop. The ringing signal bus transmits ringing signals along the subscriber loop to a subscriber instrument. The SLIC i... | 07/13/1993 |
| 5175764 | Enhanced high voltage line interface circuit An enhanced high voltage line interface circuit for a digital switching system over which a connection is established between a digital switching system and a subscriber instrument via a subscriber loop. The high voltage line interface circuit includes in... | 12/29/1992 |
| 5175532 | Optical drill collar position verifier A drill collar position verifier for use with a drill bit having a drilling depth control collar positioned coaxially thereon. The drill bit is inserted in a cylindrical opening in a plastic block to a depth determined by the position of the collar. Three... | 12/29/1992 |
| 5163090 | Over-current verifier circuit for an enhanced subscriber line interface An over-current verifier circuit used in a Subscriber Line Interface Circuit (SLIC) for validating an over-current condition on a subscriber loop comprising a first counter connected to the SLIC disposed to receive an oversense signal from the SLIC. The f... | 11/10/1992 |
| 5155733 | Arrangement for testing digital circuit devices having bidirectional outputs An arrangement is disclosed that is added to digital circuit device for providing a way of easily verifying that the device's input and output circuits are operating and connected properly. The arrangement implements a test mode in which a simple exercisi... | 10/13/1992 |
| 5119365 | Bi-directional buffer line amplifier An improved bi-directional buffer line amplifier is disclosed that provides a high performance analog interface between a Digital Network Interface Circuit (DNIC) and a transmission line. The buffer line amplifier includes a transmit amplifier network inc... | 06/02/1992 |
| 5093917 | Method for passing data parameters between a calling program and a called subroutine in a command analysis table of a computer stored data base system A method for passing data parameters between a calling program and a called subroutine in a command analysis table of a computer stored data base system is disclosed. The method uses special operating codes written in the native language of the command an... | 03/03/1992 |
| 5086371 | Printed circuit board assembly handle/stiffener A printed circuit board handle is disclosed for use with a printed circuit board. The printed circuit board handle includes a flange that extends for the length of the handle and is mounted to the printed circuit board. Two ribs protrude from the side of ... | 02/04/1992 |
| 5077891 | Method for reconstructing the conductor traces of a printed circuit board assembly A first method repairs the conductor traces of a printed circuit board assembly and includes the steps of first locating and isolating a break in an existing conductor trace. After the brake is isolated, an extrusion of a conductive resin material is appl... | 01/07/1992 |
| 5040309 | Drill collar position verifier A drill collar position verifier is disclosed for use with a drill bit having a drilling depth control collar positioned coaxially thereon. The drill bit is inserted in a cylindrical opening in a plastic block to a depth determined by the position of the ... | 08/20/1991 |
| 4868975 | Tool for inserting dual in-line packaged circuits into printed circuit board sockets A tool adapted to assist in the placement of dual in-line packaged circuits (DIPs) into printed circuit board sockets. The tool includes a channel-shaped body having parallel sides of a springlike material each side having a gripper jaw attached to the lo... | 09/26/1989 |
| 4866578 | Inspection fixture for the solder side of printed circuit boards A printed circuit board inspection fixture adapted to support a printed circuit board and including a light source and a mirrored reflective surface positioned to reflect light from the source onto the bottom side of said printed circuit board in order to... | 09/12/1989 |
| 4863388 | Rotating contact ZIF connector A two-piece rotating contact zero insertion force connector is used to interconnect printed circuit boards (daughter boards) to backplanes (mother boards), cables to panels or cables to cables. This is accomplished by rotating one-half of the mating conta... | 09/05/1989 |
| 4848639 | Compliant pad for use in tape automated bonding process A compliant pad or work piece for use in bonding the inner leads of integrated circuit devices as a part of a tape automated bonding process. The work piece is constructed of a metallic base layer to which is affixed a compliant pad, a cap support and a c... | 07/18/1989 |
| 4802161 | Packet bus interface The Arbitrated Bus Interface (ABI) is a set of custom LSI circuits which sends and receives minipackets of binary information to and from a data bus. The ABI performs arbitration, address recognition, and buffering required for transmitting and receiving ... | 01/31/1989 |
| 4795362 | Circuit connector for use with printed wiring board A mounting arrangement for printed circuit boards where electrical and mechanical connection is maintained by the characteristics of the contacts included in the connector. While support is provided for the printed wiring board, no retenion means other th... | 01/03/1989 |
| 4796256 | (MPRT) Mini packet receiver transmitter The Mini Packet Receiver Transmitter Circuit (MPRT) provides an interface between one or two eight bit microprocessors and a digital subscriber loop interface circuit. The bi-directional communication on a single wire pair is accomplished by alternating t... | 01/03/1989 |
| 4794589 | Asynchronous packet manage The Asynchronous Packet Manager is the interface for transferring data in a first format between a data terminal equipment and a combination data and telephone switching system in a properietary packet format. A microprocessor accepts data from a universa... | 12/27/1988 |
| 4783778 | Synchronous packet manager The Synchronous Packet Manager is the interface for switching synchronous data between a data terminal equipment and a combination data and telephone switching system in a proprietary packet format. A first microprocessor controlled circuit controls data ... | 11/08/1988 |
| 4747589 | Universal pneumatic parts locating system A printer table including a series of angled jets for sources of air and for sources of vacuum and also including a set of locating pins. The combination enables the use of the directed jets to move a substrate into position for processing and to hold the... | 05/31/1988 |
| 4744079 | Data packet multiplexer/demultiplexer A Multiplexer/Demultiplexer for transmitting packetized data between a processor and a Pulse Code Modulation (PCM) bus. First-in First-Out (FIFO) shift registers, serial-to-parallel and parallel-to-serial converters and associated timing and control circu... | 05/10/1988 |
| 4723204 | Dynamic RAM refresh circuit A dynamic RAM refresh circuit provides the interface for timely refresh of up to 64K of RAM memory while simultaneously providing for minimal disruption of a CPU's access of that RAM memory. Circuitry is also provided to permit interlock control for times... | 02/02/1988 |
| 4721453 | Apparatus for encapsulating semiconductors A semiconductor encapsulating apparatus including a positioning apparatus positioning an encapsulant premold (preformed piece or pellet) in contact with the semiconductor and the curing apparatus through which the semiconductor and encapsulant are passed ... | 01/26/1988 |
| 4698771 | Adder circuit for encoded PCM samples A circuit adds and subtracts pulse code modulation (PCM) samples in D2 format. An exponent subtractor determines the difference between exponents of the two PCM samples. A mantissa shifter circuit shifts the mantissa portion of a selected PCM sample to co... | 10/06/1987 |
