Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 6498797 | Method and apparatus for communication services on a network A method for performing communications over a network comprises receiving a user record for a first user, receiving a query from a second user with regard to the first user, and sending, to the second user, as a response to the query, a call-handling prof... | 12/24/2002 |
| 6426970 | Bi-directional signal coupler method and apparatus A bi-directional signal coupler is incorporated into a transmission/reception communication system and is used for the transmission and reception of signals over a single transmission medium. The bi-directional signal coupler includes a primary nulling de... | 07/30/2002 |
| 6400702 | Radio frequency local area network An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree ... | 06/04/2002 |
| 6389496 | Bridge including portals with ability to redefine network topology An initialization of local buses 14a to 14n, a definition of topology and a management of isochronous resources are performed for every local bus. Each of portals 12a to 12n includes an asynchronous packet discriminator 215 which discriminates an asynchro... | 05/14/2002 |
| 6381223 | Ring-bus technology A ring-bus transition 100 is provided which for switching signals between inputs 140-144 and outputs 180-85. First, signals are received at a number of inputs 140-144. Each input is coupled to a demod 130-134. Each demod is coupled to a communication ring... | 04/30/2002 |
| 6253249 | Method and devices for bridging data and telephone networks A data network to telephone network gateway (16) and an end-user computing device and method used by these devices are disclosed (26). The gateway (16) is in communication with both a data network (10) and a telephone network (12). The computing device (2... | 06/26/2001 |
| 6064657 | Method and system for transmitting data using a modem with a directional control mechanism The present invention pertains to a system for transmitting data. The system comprises a network on which free topology transmission of data occurs. The system comprises a first node. The system comprises a second node. The system comprises a shared free ... | 05/16/2000 |
| 6038221 | Device at telecommunications systems using a pattern of time slots A radio based access network type Digital European Cordless Telecommunication DECT in which powerful and simply-built up network components, such as repeaters are an integral part. The device makes possible a signaling which makes digital decoding and add... | 03/14/2000 |
| 6016316 | Hybrid access system employing packet suppression scheme An asymmetric network communication system having a packet and an acknowledgment packet suppression system for use in a client-server environment having forward and return channels operating at different speeds and/or under different protocols on the same... | 01/18/2000 |
| 5991844 | Redundant bus bridge systems and methods using selectively synchronized clock signals A redundant bus bridge system for communicating between a first bus and a second bus includes a first clock generator operative to produce a first clock signal and a second clock generator operative to produce a second clock signal. A first bus bridge, e.... | 11/23/1999 |
| 5818845 | Hybrid access system having channel allocation and prioritized polling schemes An asymmetric network communication system for use in a client-server environment having independent forward and return channels operating at different speeds and/or under different protocols on the same or different communication media to provide efficie... | 10/06/1998 |
| 5802103 | High speed serial link for fully duplexed data communication A system for converting between parallel data and serial data is described. In the system 10, individual bits of the parallel data 12 are latched into individual registers 117. Each register 117 is coupled to a corresponding AND gate 110 which is also con... | 09/01/1998 |
| 5651001 | Method and apparatus for full duplex signaling A network transmitter device and network receiver device is described. The network transmitter device transmits a first voltage potential, a second voltage potential, a third voltage potential and a fourth voltage potential over a first pair of output lin... | 07/22/1997 |
| 5253249 | Bidirectional transceiver for high speed data system A transceiver circuit for use in a high speed data transmission network is disclosed that provides for simultaneous bidirectional transmission of data over coaxial or twisted pair media. A transmitter circuit provides an output data signal to a bridge net... | 10/12/1993 |
| 5231628 | Network system for data transmission The invention relates to a network system for data transmission between two data processing units, e.g. a peripheral unit (PE) and a Token Ring network with a cable concentrator. Full duplex transmission is effected over each transmission channel between ... | 07/27/1993 |
| 4670870 | Adaptive cancellation bridge circuit The invention relates to an adaptive cancellation bridge circuit (ACB) for use in a single medium full duplex line termination equipment such as modems where signals are transmitted and received simultaneously along a pair of wires, the transmit and recei... | 06/02/1987 |
| 4476557 | Duplex signaling circuit A duplex signaling circuit for signaling with respect to a line circuit includes a resistance bridge hybrid (22, 27, 28, 32) having a modified resistance makeup to reduce power consumption and improve longitudinal current immunity without altering conjuga... | 10/09/1984 |
| 4418249 | Four-wire terminating circuit A four-wire termination circuit has a series arrangement of a current source controlled by a transmitting arm of a four-wire line and a first resistor. This arrangement is connected in parallel to a two-wire line terminal impedance formed by a second resi... | 11/29/1983 |
| 4399530 | Method and apparatus for coding and decoding binary data A Coding and decoding method for binary data and associated synchronous clock pulses, wherein the transmission is a half-duplex transmission reception system effected over a single pair of conductors which allows both transmission of the binary data and t... | 08/16/1983 |
| 4386242 | Impedance matching using active couplers Circuitry (100) for providing impedance compensation between a source impedance (501) and a load impedance (505) which is proportional to the source impedance comprises: a pair of directional couplers (200 and 300), each coupler including bidirectional tr... | 05/31/1983 |
| 4378472 | Two to four wire hybrid circuit arrangement for a pulse code modulated time multiplex telecommunication system A hybrid circuit arrangement for a telecommunication system includes a transformer having a first and a second partial winding connected to a two-wire line. Third and fourth partial windings having a grounded junction are coupled to a receiving branch and... | 03/29/1983 |
| 4086428 | Circuit arrangement for the automatic adjustment of a two-wire full duplex data transmission system In a two-wire, full duplex data transmission system a circuit arrangement is described for carrying out an automatic adjustment of the value of the current flowing from the transmitter in a given station to a receiver therein relative to the value of the ... | 04/25/1978 |
| 4074086 | Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission An adaptive equalizer and echo canceller jointly respond to a common error difference between the actual output and the quantized digital output of a data receiver in a two-wire digital data transmission system to achieve simultaneous full-bandwith full-d... | 02/14/1978 |
| 4052556 | Circuit arrangement for balancing a two wire full duplex data transmission system Apparatus is described for balancing a two wire, full duplex data transmission system. In the described system a transmitter and receiver in one station are connected to a transmitter and receiver in another station by means of two lines. The two lines ca... | 10/04/1977 |
| 4012590 | Circuit arrangement for two-wire full duplex data transmission A circuit arrangement for providing full duplex data communication over two wires is described. Each station connected to the two wires contains a transmitter and receiver. The receivers are connected across the two lines; a balancing resistor connects on... | 03/15/1977 |
| 3983323 | Full-duplex digital transmission line system A finite drive impedance, unbalanced transmission line system for transmitting only the differentiated transitions of a binary level digital signal is disclosed. The transmission line arrangement includes two identical, balanced-bridge transceivers at opp... | 09/28/1976 |
| 3955051 | Data set with bridge for duplex operation A data set connecting a data terminal to a data channel for concurrently transmitting and receiving data. Full duplex operation is achieved over the data channel which is typically a two-wire telephone line. In one configuration, a data set receives signa... | 05/04/1976 |
