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Class Information
Number: 333/177
Name: Wave transmission lines and networks > Coupling networks > Frequency domain filters utilizing only lumped parameters > Transformer coupled
Description: Subject matter which include a mutual inductance link of the lumped type between the input and output of the filter.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5095291 |
Communication filter for unshielded, twisted-pair cable |
Mar. 10, 1992 |
| 5077543 |
Balanced low-pass common mode filter |
Dec. 31, 1991 |
| 5075650 |
Bandpass filter |
Dec. 24, 1991 |
| 5065301 |
Switching power supply |
Nov. 12, 1991 |
| 5023585 |
Common-mode choking coil |
Jun. 11, 1991 |
| 4945332 |
Noise suppression inductor |
Jul. 31, 1990 |
| 4910482 |
AC line filter |
Mar. 20, 1990 |
| 4903006 |
Power line communication system |
Feb. 20, 1990 |
| 4894629 |
Bandpass filter having magnetically coupled resonators |
Jan. 16, 1990 |
| 4891536 |
Solid state switch |
Jan. 2, 1990 |
| 4875223 |
Twisted pair adapter |
Oct. 17, 1989 |
| 4866407 |
Noise filter and method of making the same |
Sep. 12, 1989 |
| 4835497 |
AC line filter |
May. 30, 1989 |
| 4823383 |
Protection device for terminal equipment on telephone subscriber premises |
Apr. 18, 1989 |
| 4779068 |
Noise suppression inductor |
Oct. 18, 1988 |
| 4768002 |
Power filter resonant frequency modulation network |
Aug. 30, 1988 |
| 4761623 |
Broadband RFI power line filter |
Aug. 2, 1988 |
| 4760356 |
Power line filter |
Jul. 26, 1988 |
| 4760325 |
High frequency coil arrangement |
Jul. 26, 1988 |
| 4754242 |
Resonator |
Jun. 28, 1988 |
| 4752751 |
Reference circuit for alternator outputs |
Jun. 21, 1988 |
| 4728911 |
Loss-impaired filter apparatus for suppressing radio frequency interference on a two-wire line |
Mar. 1, 1988 |
| 4725739 |
AC branch power distribution filter |
Feb. 16, 1988 |
| 4720907 |
Identification system |
Jan. 26, 1988 |
| 4694266 |
Notch filter |
Sep. 15, 1987 |
| 4677401 |
Noise filter for three-phase four-wire system |
Jun. 30, 1987 |
| 4667173 |
Line filter |
May. 19, 1987 |
| 4636752 |
Noise filter |
Jan. 13, 1987 |
| 4623918 |
Pay television system utilizing multi-frequency passive filters |
Nov. 18, 1986 |
| 4622522 |
Track circuit for AC electrified railways |
Nov. 11, 1986 |
| 4614924 |
Apparatus for screening appliances from high frequency interference |
Sep. 30, 1986 |
| 4600903 |
Gain control compensation for bandpass filter with variable bandwidth |
Jul. 15, 1986 |
| 4599587 |
Impedance element |
Jul. 8, 1986 |
| 4591814 |
Electronic component comprising printed circuit elements disposed on a folded tape and method of making such component |
May. 27, 1986 |
| 4577168 |
Notch filter |
Mar. 18, 1986 |
| 4509024 |
Impedance bond |
Apr. 2, 1985 |
| 4490699 |
Intermediate frequency band-pass filter |
Dec. 25, 1984 |
| 4481663 |
Network for use with piezoceramic transducer |
Nov. 6, 1984 |
| 4456895 |
Band selectable tunable bandpass filter |
Jun. 26, 1984 |
| 4453145 |
Band pass filter |
Jun. 5, 1984 |
| 4451804 |
Four-terminal network |
May. 29, 1984 |
| 4433326 |
Power line communication system using the neutral and ground conductors of a residential branch circuit |
Feb. 21, 1984 |
| 4428018 |
Low leakage filtered power supply |
Jan. 24, 1984 |
| 4427955 |
Capacitor structure for integrated multi-stage filter |
Jan. 24, 1984 |
| 4422056 |
Integrated multi-stage electrical filter |
Dec. 20, 1983 |
| 4409569 |
Filter circuits having transformers as filter elements |
Oct. 11, 1983 |
| 4408171 |
Noise filter with socket attached thereto |
Oct. 4, 1983 |
| 4383203 |
Circuit means for efficiently driving an electrodeless discharge lamp |
May. 10, 1983 |
| 4378539 |
Line choke |
Mar. 29, 1983 |
| 4369416 |
Band-stop filter for equipment with carrier-frequency utilization of low-voltage lines |
Jan. 18, 1983 |
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