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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 5120909 | Terminating devices detection and verification circuit A circuit for detecting and verifying a presence of a terminating device for a high speed data transmission line. The circuit contains a first cable detector which generates a first signal if a first cable is present. A second cable detector generates a s... | 06/09/1992 |
| 5073920 | Method and apparatus of measuring a subscriber line A subscriber line measuring method and apparatus can charge a line capacitance of a telephone subscriber line in a very short time as compared with a prior art by charging the line capacitance by a predetermined current without use of a high resistor (100... | 12/17/1991 |
| 4995054 | Data transmission using switched resonance A transmission arrangement includes a switched resonant circuit (5) for switching data states of digital signals on a pair of transmission lines (1, 2) and a regenerative circuit (7) for feeding power back on the lines. The switched resonant circuit has a... | 02/19/1991 |
| 4736385 | Transmitter and receiver circuit High frequency transmitter and receiver circuits are AC coupled for party line transmission over coaxial cable where the circuits are connectable to the cable by use of stinger taps and thereby eliminate the need to interrupt service when connecting the c... | 04/05/1988 |
| 4734919 | Circuit for serial data communication and power transmission A circuit for serial data communication and power transmission between a main controller and a sub-station along two balanced transmission lines. The circuit includes a power supply for providing a DC voltage to the sub-station along the transmission line... | 03/29/1988 |
| 4592033 | Apparatus for improving the data transmission rate in a telemetry system The data transmission rate in a cable telemetry system is improved by preconditioning an encoded data signal prior to discriminating and decoding it with a filter/amplifier employing an operational amplifier having a non-inverting input connected to recei... | 05/27/1986 |
| 4520488 | Communication system and method A communication system for communicating analog and digital data with a process variable, e.g., pressure, transmitter over the two wires which supply power to the transmitter apparatus. The digital communication operation is half-duplex, bit serial transm... | 05/28/1985 |
| 4434497 | Response time bidirectional circuitry Bidirectional circuitry, which includes two amplifiers, each having a capacitor connected between an input and an output terminal thereof, and two interrupt transistors, acts to provide amplification and/or level shifting of information between two transc... | 02/28/1984 |
| 4425663 | Low input capacitance data network transceiver A data communications transceiver for transmitting signals to and from a medium has an output driver connected to the medium through a series connected first pair of diodes and a receiving transistor amplifier whose input is connected to the medium and wh... | 01/10/1984 |
| 4403111 | Apparatus for interconnecting data communication equipment and data terminal equipment An interface for connecting data terminal equipment (DTE) to data communication equipment (DCE) is provided which requires no modification to an existing and widely accepted DCE connector and yet which permits data communication according to more recently... | 09/06/1983 |
| 4385394 | Universal interface for data communication systems A system for transmitting and receiving serial data over a pair of differential lines so that relatively large differences in ground potential will not affect the integrity of the transmitted data. Each differential line has a first switch for pulling the... | 05/24/1983 |
| 4341927 | Data transmission apparatus Signal data is generated by interconnected non-inverting and inverting voltage followers and is transmitted on power-carrying conductors to a remote detection circuit comprising a differential amplifier which receives equal in-phase signal inputs of oppos... | 07/27/1982 |
| 4322854 | Data communications terminal A data communications terminal is provided for interfacing with a central data processing system to handle a variety of data acquisition and control functions including the minitoring and control of security devices and pay television receivers. The termi... | 03/30/1982 |
| 4184045 | System and method for transmission of information Serial transmission of binary information on a two-conductor line is effected by transmitting a periodic signal on one conductor and earthing the other conductor when a binary "0" is to be transmitted, while the periodic signal is transmitted on the other... | 01/15/1980 |
| 4099022 | System for pulse data transmission through water-return cables A system for data pulse transmission through a single-wire, water-return cable payed out from a coil in an open pack to any selected length over a predetermined wide range (e.g., 4K to 16K feet) employing a toroidal core around the cable near the pack and... | 07/04/1978 |
