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"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."
T. Craven, FCC Commissioner ; 1961
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| Number | Title | Issue Date |
| 4602240 | Apparatus for and method of attenuating power line carrier communication signals passing between substation distribution lines and transmission lines through substation transformers A shunt three-phase wye-connected capacitor bank is connected intermediate a substation transformer and any source of zero-sequence power line carrier communication signals being transmitted on the substation distribution network to partially alleviate un... | 07/22/1986 |
| 4481501 | Transformer arrangement for coupling a communication signal to a three-phase power line A communication signal is coupled simultaneously to all three phases of a three-power line through a three-phase open delta transformer with the communication signal being applied across the low voltage pair of windings.... | 11/06/1984 |
| 4473816 | Communications signal bypass around power line transformer A circuit for bi-directionally bypassing a delta-wye transformer with a balanced phase-to-neutral power line communications signal, using passive components. The circuit includes a set of three capacitors connected in a wye configuration, each having one ... | 09/25/1984 |
| 4473817 | Coupling power line communications signals around distribution transformers A circuit is described for bi-directionally coupling a communication signal around a distribution transformer. The circuit includes a single-phase coupling transformer with a primary to secondary voltage ratio approximately equal to that of the distributi... | 09/25/1984 |
| 4458236 | Communications signal coupling around wye/delta power transformation A circuit is disclosed for coupling a power line communications signal between two three-phase power lines, with the signal being transmitted in a balanced phase-to-neutral mode on the first line and in a phase-to-phase mode on the second line. The circui... | 07/03/1984 |
| 4244047 | Multiplexed carrier transmission through harmonic polluted medium Multiplexed carrier signals modulated with digital data are transmitted through a medium polluted with harmonic signals by asymmetrically positioning the frequency of one of the carrier signals between two of the adjacent system harmonics, modulating that... | 01/06/1981 |
| 4088957 | Method and apparatus for synchronously detecting a differentially encoded carrier signal A differentially encoded carrier signal is synchronously detected by generating an output signal indicative of the carrier signal characteristic in each transmitted bit interval during the interval, storing it so that in the next bit interval it can be co... | 05/09/1978 |
