Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 5426633 | System for processing synchronization signals with phase synchronization in a mobile communication network For synchronization signals of zeroth and first series, a synchronization signal processing system comprises synchronization trunk device of the zeroth and the first series (77(0), 77(1)) for producing particular signals of the zeroth and the first series... | 06/20/1995 |
| 5422915 | Fault tolerant clock distribution system A fault tolerant multiple phase clock distribution system for providing synchronized clock signals to multiple circuit loads. Multiple electrically isolated power domains are powered by redundant AC and DC power sourcing circuits to ensure continued opera... | 06/06/1995 |
| 5420865 | Method and apparatus for alignment of frames of information A frame alignment method and system for communicating frames of information between at least two devices. A `start of alignment sequence` is used to cause a device that is in the misaligned state to inform the other device of this state condition in such ... | 05/30/1995 |
| 5414740 | Synchronous communication system having multiplexed information transfer and transition phases A communication system segment having phase multiplexing. A first communication station contains a data source which sequentially outputs a series of data signals during a series of clock periods. The data source outputs one data signal from the series du... | 05/09/1995 |
| 5408506 | Distributed time synchronization system and method A distributed time synchronization system and method synchronizes nodes within a frequency hopping spread spectrum (FHSS) local area network (LAN) group to a virtual master clock value. Each node system of the present invention comprises a CPU, an input d... | 04/18/1995 |
| 5402473 | Communication device and data transmitting method On receiving a digital signal from a computer (2), a frequency detector (28) determines a transmitting speed for computer (2). When the computer (2) has an operating frequency of 7.9872 of MHz, a speed other than one of the standardized speeds is selected... | 03/28/1995 |
| 5388100 | Receiving circuit for digital data transmitted by wireless communication A receiving circuit, which prevents spikes included in reproduced clock signals, caused by a time slot change in the division multiplex wireless communication or by the switching of diversity antenna, from being transmitted to the following circuits, and ... | 02/07/1995 |
| 5386418 | Method for synchronizing synchronous data communication network and communication device used in the synchronous data communication network A method of switching from one synchronizing signal source to another in a synchronous data communication network in which a plurality of stations are connected to each other via lines and A plurality of synchronizing signal sources are provided inside or... | 01/31/1995 |
| 5383188 | Receiver having clock phase memory for receiving short preamble time slots A clock phase signal of each time slot of a TDM signal is stored into a corresponding memory location and a clock phase signal of a subsequent time slot is read from a memory location corresponding to the subsequent time slot for recovering clock pulses. ... | 01/17/1995 |
| 5381416 | Detection of skew fault in a multiple clock system A skew fault detection system for detecting clock skew between two clock phases utilizes a plurality of skew fault detection circuits each of which employs two D-type flip-flops. The clock terminals of both of these flip-flops are connected to one of the ... | 01/10/1995 |
| 5377209 | Telecommunications system data alignment equipment and method Synchronization of a receiving termination of a telecommunications system with an incoming data stream is carried out from a synchronization signal carried with the data stream. It is possible that a "mimic" of the synchronization signal may occur within ... | 12/27/1994 |
| 5377205 | Fault tolerant clock with synchronized reset A fault tolerant clock system that includes voting of power-on and other reset signals to ensure tight synchronization. A fault tolerant clock system (10) includes four channels, providing tolerance to a catastrophic failure in one of the channels and a s... | 12/27/1994 |
| 5373537 | Method and apparatus for the synchronization of a clock means of a telecommunication switching system Method and apparatus for synchronizing a clock of a telecommunication switching system. The clock of the telecommunication switching system is supplied, at least at times, with reference clock signals from a plurality of external reference clock sources. ... | 12/13/1994 |
| 5331667 | Telephone exchange apparatus with communication line clocking In a telephone exchange apparatus which accommodates digital communication liens and employs a slave synchronization system in which a clock is extracted from a signal received from the network, an exchange switch is operated in synchronism with the extra... | 07/19/1994 |
| 5297145 | Digital subscriber line circuit for connecting an ISDN subscriber to the trunk side of a digital exchange A digital subscriber line circuit for connecting an ISDN subscriber to the trunk side of a digital exchange which comprises an SLD interface operating according to the SLD system. The subscriber line circuit further includes a transfer arrangement for tra... | 03/22/1994 |
| 5274678 | Clock switching apparatus and method for computer systems A clock switching apparatus is provided in a data processing system which includes a system clock for selectively switching the system clock from a first clock signal to a second clock signal and vice versa. The clock switching apparatus includes a multip... | 12/28/1993 |
| 5255292 | Method and apparatus for modifying a decision-directed clock recovery system The present disclosure includes a discussion of a decision-directed clock recovery system which includes circuitry to prevent false-locking and accelerate acquisition on a known symbol patterns. The clock recovery system has at least two control circuits.... | 10/19/1993 |
| 5245634 | Base-site synchronization in a communication system A central-site (100) has located within it a synchronization system for purposes of backing-up a GPS external synchronization system. The central-site (100) is coupled to a plurality of base-sites (102, 103) which are required to be synchronized to one an... | 09/14/1993 |
| 5233608 | Method of and a device for receiving data packet form A method of and a device for receiving data in packet form. In the method, a synchronization with incoming data is searched for by using a receiving modem, and first clock pulses in correct synchronization with the data are generated and the synchronized ... | 08/03/1993 |
| 5228060 | Control unit for controlling modem used in receiver A control unit for controlling a modem used in a receiver demodulates a received signal by use of an adaptive equalizer, and a recovery circuit includes a timing recovery function and a carrier recovery function. States regarding operations in the adaptiv... | 07/13/1993 |
| 5228030 | Time division communication system frame changeover arrangement A frame organized time division multiplex communication system includes a central office and at least one remote terminal. A time division link connected between each remote terminal and the central office carries signals organized in time division multip... | 07/13/1993 |
| 5224128 | Method and circuit arrangement for monitoring the operating condition of an electro-optical transmission system For recognizing the status of a "no light" condition at the signal input of a receiving terminal, measured values that correspond to the electrical signal level of received signals are stored at given time intervals. In the absence of digital signals, the... | 06/29/1993 |
| 5185740 | Information transmitting device In an information transmitting device which transmits information in a preamble portion and a plurality of data blocks as a unitary set, when a block synchronizing code in the data blocks is detected, the timing of the detection and the block synchronizin... | 02/09/1993 |
| 5177740 | Frame/slot synchronization for U.S. digital cellular TDMA radio telephone system Frame/slot synchronization is applied to a received Time Division Multiple Access (TDMA) signal and a temporal position of a reference feature is acquired, such as a synchronizing bit stream or preamble, associated with a desired time slot. The desired ti... | 01/05/1993 |
| 5175734 | Clock supply for multiplex systems Clock supply for multiplex systems for distributing at least one system clock signal and at least one frame clock signal, whereby a marking circuit is provided to which both clock signals are provided and that generates a combined system-frame clock signa... | 12/29/1992 |
| 5163069 | Pattern synchronizing circuit and method An input pattern is re-timed in a re-timing circuit by an input clock signal of the same frequency as that of the input pattern, and the re-timed input pattern and a reference pattern generated by a reference pattern generator in synchronization with the ... | 11/10/1992 |
| 5161171 | Digital data transmitting apparatus In an apparatus for transmitting digital data which includes information data and synchronous data having a plural-byte code arranged in a plural-byte code of the information data; the top bit position of the sync code is predicted by converting the trans... | 11/03/1992 |
| 5146585 | Synchronized fault tolerant clocks for multiprocessor systems A system for providing fault-tolerant synchronized operation of the Time of Day (TOD) clocks of the respective data processors in a multiprocessor complex. Basically, the system is comprised of a duplex implementation having redundant TOD clock sources, a... | 09/08/1992 |
| 5138636 | Circuit for detecting received signal loss in a digital signal receiver A signal loss detection circuit, for detecting signal loss in a digital signal receiver of the type including a clock recovery circuit for reconstituting the received clock in such a manner that the loss of received signal is manifested by an absence of p... | 08/11/1992 |
| 5136617 | Switching technique for attaining synchronization Synchronization of a local clock in a transmission system node is achieved by using synchronization circuitry such as a phase-locked loop (PLL). This synchronization circuitry is provided with a selected one of a multiplicity of timing signals derived fro... | 08/04/1992 |
| 5134637 | Clock recovery enhancement circuit An improved clock recovery enchancement circuit is provided that is particularly adapted for solving the problem caused by an incoming signal that is asymmetric and comprises a sub-harmonic tone of the bit rate clock, that is 180° out of phase with the r... | 07/28/1992 |
| 5131012 | Synchronization for cylic redundancy check based, broadband communications network A received digital signal is synchronized with a receiver in a communications network by employing a code word which is updated in accordance with a unique update technique. The synchronization arrangement receives the digital signal at a receiver, genera... | 07/14/1992 |
| 5131006 | Carrier detection for a wireless local area network A local area network (10) utilizes a wireless transmission link and has network stations (12) each having two differently polarized antennas (14, 16). Data transmission utilizes a spread spectrum code and in the receiver, correlator outputs are utilized i... | 07/14/1992 |
| 5128928 | Digital radio telephone system The telephone system of the present invention is realized by a unique dynamic time slice architecture which allows for up to 480 transfers of data. A dual port RAM is utilized in which are stored two pages of data, containing time slice information identi... | 07/07/1992 |
| 5109393 | Mobile communications system insensitive to false frame sync In a mobile communication system, the base station sequentially scans speech channels and a control channel to monitor call status and detect a call request from a mobile station containing a frame sync and an encoded user's identifier. A successive bit s... | 04/28/1992 |
| 5107495 | Frame synchronization system A frame synchronization system includes a synchronization detector supplied with a digital signal including frame synchronizing pulses for outputting the digital signal in a frame synchronization state, an adding part for adding a forward guard identifica... | 04/21/1992 |
| 5086436 | Coded transmission system with initializing code A coded transmission system wherein each bit of transmitted data having a logical value is coded depending on a coded result of a preceding bit. The coded transmission system contains a sender-side apparatus, a transmission line, and a receiver-side appar... | 02/04/1992 |
| 5077794 | Dual framing bit sequence alignment apparatus and method A dual-framing-bit-alignment apparatus having a communications channel, a data device, an encryptor, a framing-bit device, a decryptor, a first framing-bit repositioner, and a second framing-bit repositioner. The first data device generates a first data-b... | 12/31/1991 |
| 5077734 | Electronic exchange apparatus synchronized with digital network A private branch exchange includes an oscillator for generating a reference clock defining the transmission frequency of a digital network, a clock generating circuit for generating a clock, whose frequency is slightly higher than that of the reference cl... | 12/31/1991 |
| 5072449 | Packet framing using cyclic redundancy checking Packets transported over a serial data stream need to have their start and stop information encoded so that they can be parsed by the receiving device. Techniques used in various standards require extra bandwidth to carry this information. For framed data... | 12/10/1991 |
