Lipton; Roy C. - US Patent Attorneys and Agents

Attorney: Lipton; Roy C.

Number of patents: 37
Last date: February 19, 1985

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Number	Title	Issue Date
4500960	Geographically distributed multiprocessor time-shared communication processing system A geographically distributed multiprocessor system is implemented by locating groups of processors at nodes which are interconnected by way of a transport network and which are connected by way of local lines to customer terminals and hosts. Each processo...	02/19/1985
4475192	Data packet flow control scheme for switching networks Flow of data packets through virtual circuits in a multinode packet switching network is controlled by authorizing packets to enter and to leave each node. When a packet entering a node does not have an authorization (credit) to leave, it is placed in a p...	10/02/1984
4472784	Ensuring sample independence in random sampling systems A technique for ensuring independence of random samples of input queues of time-shared processing systems taken during a fixed interval to determine system usage involves interposing guardband intervals of minimum time duration between such samples. A str...	09/18/1984
4418312	Apparatus for testing multi-conductor cables Apparatus for testing multi-conductor cables for wiring errors, illustratively open, shorted or crossed conductors, is described. This apparatus, at the so-called far end of the cable, establishes a conduction path between all of the conductors, and, at t...	11/29/1983
4414628	System for displaying overlapping pages of information Various size frames or pages of information elements stored in a computer system can be simultaneously displayed on a screen-based terminal. The computer processor identifies the screen position the user selects for each of the stored pages and the top-to...	11/08/1983
4384278	One-bit codec with slope overload correction In a delta modulation coder and decoder system, the disadvantageous effects of slope overload are eliminated by reversing the polarity of the feedback signal in the coder and the polarity of the reconstructed analog signal in the decoder whenever slope ov...	05/17/1983
4373204	Phase locked loop timing recovery circuit The phase of timing signals is compared with the phase of incoming digital signals to produce phase error signals and repeated phase corrections of the timing signals are made in accordance with the phase error signals. The phase corrections are initially...	02/08/1983
4320258	Arrangement for requesting service for called telephone subscribers An improved ringing control circuit in a stored program telephone switching system which provides a called subscriber an interval or window of time after answering a call to send a request for special services such as identification of the number of the c...	03/16/1982
4282400	Signaling unit for interchange of data with multipoint line selection units and data terminals A subscriber at a remote location is provided the capability of configuring a multipoint private line network composed of multipoint junction units or hubs that provide alternative functions of permitting exclusive data intercommunication between main lin...	08/04/1981
4281315	Collection of messages from data terminals using different protocols and formats A central controller (104) for a multipoint polling system arranged to collect inquiry messages from data terminals (102a-n, 103a-n) for processing by a data base (101) and for distributing response messages to the terminals, the several terminals using d...	07/28/1981
4247945	Extraction of data characters imbedded in data bytes Recovery of eight-bit data characters imbedded in the time slots of a train of data bytes individually having six slots available is implemented by a process which locates the bit alignment of a first one of the characters and executes a sequence of assem...	01/27/1981
4237553	Data packet multiplexing in a staggered fashion Communication between a plurality of data stations (100(1)-100(N)) serially interconnected by way of a line (101) arranged in a ring is provided by bit interleaved data packets. A control station generates framing signals to designate the start of each pa...	12/02/1980
4236245	Ring communication system data packets reusable a variable number of times Communication between a plurality of data terminals (101(1) to 101(b)) serially interconnected with a main terminal (102) is provided by data frames or packets having a data portion for accommodating a burst of data preceeded by a header portion for accom...	11/25/1980
4224582	Commutating capacitive envelope detector The peak output of a commutating capacitor triplet device (201) which contains three capacitors (10, 11, 12) connected in pairs across an input signal to provide six samples of each signal cycle, is obtained to provide envelope detection. To reduce output...	09/23/1980
4218756	Control circuit for modifying contents of packet switch random access memory The information in the header portion of a data packet, which header includes the old module and channel numbers, is used to access locations in a random access memory which contain new module and channel numbers or words that identify the packet routing....	08/19/1980
4185242	Signal-to-noise ratio measurement of intermittent signals The signal-to-noise ratio of intermittent reception by a radio receiver from a push-to-talk transmitter is measured by comparing AGC voltage levels derived from a signal period with levels derived from the prior no-signal period containing noise only. The...	01/22/1980
4171466	Digital wave generator for composite tone Digital words defining magnitude levels of samples of phases of a wave cycle are stored in two memories arranged to store samples of 440 Hz and 480 Hz tones. The words are read out of the memories in a predetermined order which defines successive phases o...	10/16/1979
4170764	Amplitude and frequency modulation system Combined amplitude and frequency-shift-keying (AM-FSK) modulation of a carrier wave by a baseband data signal achieves significant suppression of one of the sidebands to ease the design requirements of filters generally used in the transmission of FSK sig...	10/09/1979
4164716	Clock level shifting circuit A level shifting circuit for binary signals comprises a pair of equal value resistors connecting a common input signal to a pair of input terminals of a differential amplifier. A capacitor from one input terminal to ground stores the long term average inp...	08/14/1979
4144525	Cascadable analog to digital converter A circuit for converting an input analog signal into a digital representation and a remainder signal is disclosed. The digital representation is generated by a coder that counts an integral number of clock cycles during an interval in which the magnitude ...	03/13/1979
4122301	Selection of branch lines of multipoint junction circuits A multipoint junction unit at a hub office interconnects a main line and a plurality of branch lines, the main line extending to a control station and the branch lines extending to data station line loops, to downstream local offices and to a main line of...	10/24/1978
4105863	Arrangement for combining data symbols in accordance with a predetermined weighting function To minimize distortion, a sequence of phase modulated signal elements (data symbols) are combined in accordance with a predetermined shaping (weighting) function by a transversal filter augmented with a baud rate control circuit. The transversal filter in...	08/08/1978
4100533	Multipoint polling technique A multipoint polling system wherein a multipoint switch selectively connects a plurality of remote terminals to a central station in response to remote terminal addresses transmitted on a signaling path to the multipoint switch. Polling apparatus stores p...	07/11/1978
4090133	Digital time interval sensor using a free running counter and a cycle counter with only the latter being reset at each event Intervals between zero crossings of tone signals on two incoming lines are measured by a clock driven, free running binary counter common to the two lines and by an overflow counter individual to each line. The overflow counter is reset by the reception o...	05/16/1978
4076968	Telephone ringer intensity control responsive to ambient noise The loudness of a telephone set ringer is controlled by audible ambient noise in the vicinity of the telephone set to match the ringer intensity level to the ambient noise level. During an on-hook state of the telephone set, the transmitting microphone is...	02/28/1978
4074358	Test set for measuring jitter distortion of data pulses Time jitter distortion of data pulses is measured by a test set which recovers a median leading and a median trailing edge from the data pulses, defines a point of time reference at the midpoint of the median leading and trailing edges, generates a digita...	02/14/1978
4071908	Adaptive polling technique Messages are collected by a central polling station from a plurality of remote terminal stations on a multiparty line. The central polling station is arranged to initially query stations in groups, probing successively smaller size subgroups of each group...	01/31/1978
4069970	Data access circuit for a memory array A memory array, having a plurality of intersecting rows and columns, stores digitized speech. Each row and column intersection consists of a binary storage cell for storing one bit of digitized speech. Incoming digitized speech is loaded into columns of t...	01/24/1978
4048441	Error control for digital multipoint circuits A multipoint synchronous data network is formed by junction units which provide signal paths that interconnect incoming branch lines to a common outgoing branch. The junction units arranged to combine the branches so that data words on one branch are prop...	09/13/1977
4027114	Echo prevention circuit Echo propagation is prevented on four-wire signaling path to two-wire signaling path connections. A first transmission path portion is extended from the receive leg of the four-wire signaling path to the transmit leg and a second transmission path portion...	05/31/1977
4019143	Standby apparatus for clock signal generators A clock output signal is aligned in phase to conicide with the phase of signals derived from a master clock. In the event that there is a malfunction of the master, standby control circuitry modifies the phase of the clock output signal incremental quanti...	04/19/1977
4007421	Circuit for encoding an asynchronous binary signal into a synchronous coded signal Successive intervals of an asynchronous binary signal are examined for the occurrence of transitions and each transition is encoded into a 2-bit binary code word. The occurrence of two transitions within a predetermined interval of time indicates that the...	02/08/1977
4004103	Path-finding scheme for a multistage switching network A plurality of idle paths through a multistage switching network which are capable of establishing a connection between a particular line and a particular trunk are identified. Repeated selection of paths identified as idle, but actually out-of-service, i...	01/18/1977
3993880	Resistive battery feed for line circuits A line circuit, interconnecting a subscriber telephone line and a port circuit, includes shunt battery feed resistors of equal impedance together with resistors in series with the subscriber line and a further resistor connected to a point intermediate on...	11/23/1976
3961140	Line switch controller for a time-division switching system A line switch controller for time division telephone switching systems incorporates the function of a time slot assignment memory. Time slots are defined by the repetitive numerical sequence produced by a local time slot counter in enumerating clock pulse...	06/01/1976
3959599	Call initiation delay arrangement for digital data switching system A digital data switching system is designed for rapid calling of data machines by subscriber polling equipment. In the event, however, that calls cannot be completed due, for example, to busy conditions of called machines or to failure of machines to answ...	05/25/1976
3950616	Alignment of bytes in a digital data bit stream A sequence of data bytes, which includes a low signaling rate control signal inserted in the framing bit position of each byte, is prepared for transmission by scrambling the information bits while maintaining the framing bit position unscrambled. Pairs o...	04/13/1976

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Attorney: Lipton; Roy C.