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Class Information
Number: 333/175
Name: Wave transmission lines and networks > Coupling networks > Frequency domain filters utilizing only lumped parameters > Resonant, discrete frequency selective type
Description: Subject matter which include resonant series and/or parallel inductance and capacity networks which offer a low impedance path to energy of a particular frequency or of a plurality of separate discrete frequencies and/or offer a high impedance path to energy of a particular frequency or of a plurality of discrete frequencies.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5132647 |
Band pass and elimination filter network for electric signals with inputs symmetric to a specific reference level |
Jul. 21, 1992 |
| 5121088 |
Frequency response equalizer |
Jun. 9, 1992 |
| 5107233 |
Amplitude correction of field coupled varactor tuned filters |
Apr. 21, 1992 |
| 5105172 |
Monolithically realizable radio frequency bias choke |
Apr. 14, 1992 |
| 5097236 |
Parallel connection multi-stage band-pass filter |
Mar. 17, 1992 |
| 5096551 |
Metallized tubule-based artificial dielectric |
Mar. 17, 1992 |
| 5072200 |
Combination of active and passive filters |
Dec. 10, 1991 |
| 5065301 |
Switching power supply |
Nov. 12, 1991 |
| 5032807 |
Notch filter using helical transmission line and coaxial capacitor |
Jul. 16, 1991 |
| 5032810 |
LC filter |
Jul. 16, 1991 |
| 5029780 |
Multi-frequency railroad grade crossing termination shunt assembly |
Jul. 9, 1991 |
| 5028894 |
Bandpass filter circuit arrangement |
Jul. 2, 1991 |
| 5019794 |
Bandpass filter having an adjustable bandwidth |
May. 28, 1991 |
| 4970479 |
Multicoupler including frequency shift filters |
Nov. 13, 1990 |
| 4967334 |
Inverter input/output filter system |
Oct. 30, 1990 |
| 4956710 |
Television receiver tuner high pass input filter with CB trap |
Sep. 11, 1990 |
| 4954814 |
Tag and method of making same |
Sep. 4, 1990 |
| 4939486 |
Filter equipment for power lines |
Jul. 3, 1990 |
| 4901043 |
Compact filter having a multi-compartment housing |
Feb. 13, 1990 |
| 4876739 |
TVRO receiver system with low-cost video-noise reduction filter |
Oct. 24, 1989 |
| 4876555 |
Resonance label and method for its fabrication |
Oct. 24, 1989 |
| 4849721 |
Bandpass filter for a CATV converter |
Jul. 18, 1989 |
| 4843404 |
Tag web of spiral conductors |
Jun. 27, 1989 |
| 4839617 |
Bandpass filter circuit arrangement |
Jun. 13, 1989 |
| 4760231 |
Noise filter for electric apparatus |
Jul. 26, 1988 |
| 4754242 |
Resonator |
Jun. 28, 1988 |
| 4752751 |
Reference circuit for alternator outputs |
Jun. 21, 1988 |
| 4745401 |
RF reactivatable marker for electronic article surveillance system |
May. 17, 1988 |
| 4743873 |
Highpass filter of a filter arrangement for a three-phase network connected to converters |
May. 10, 1988 |
| 4737744 |
Integrated capacitors for forming components of bandpass filters |
Apr. 12, 1988 |
| 4718117 |
TVRO receiver system with low-cost video-noise reduction filter |
Jan. 5, 1988 |
| 4717438 |
Method of making tags |
Jan. 5, 1988 |
| 4710735 |
Absorption circuit |
Dec. 1, 1987 |
| 4638270 |
Resonator comprising a coil formed of multiple layer alternately arranged conductive turns |
Jan. 20, 1987 |
| 4623918 |
Pay television system utilizing multi-frequency passive filters |
Nov. 18, 1986 |
| 4622522 |
Track circuit for AC electrified railways |
Nov. 11, 1986 |
| 4612480 |
Circuit arrangement for the radio interference suppression in brightness control devices using the phase gating principle |
Sep. 16, 1986 |
| 4608538 |
FM quadrature detector with ferrite bead tuned circuit |
Aug. 26, 1986 |
| 4598276 |
Distributed capacitance LC resonant circuit |
Jul. 1, 1986 |
| 4586007 |
Notch filter |
Apr. 29, 1986 |
| 4584544 |
Bandswitched interstage coupling network including a high side coupled capacitor |
Apr. 22, 1986 |
| 4578654 |
Distributed capacitance lc resonant circuit |
Mar. 25, 1986 |
| 4571560 |
Switched bandpass filter |
Feb. 18, 1986 |
| 4555291 |
Method of constructing an LC network |
Nov. 26, 1985 |
| 4551780 |
Apparatus for reducing subsynchronous frequencies in a power supply |
Nov. 5, 1985 |
| 4482874 |
Method of constructing an LC network |
Nov. 13, 1984 |
| 4480239 |
Loop-gap resonator network |
Oct. 30, 1984 |
| 4472693 |
Noise filter and terminal structure therefor |
Sep. 18, 1984 |
| 4453145 |
Band pass filter |
Jun. 5, 1984 |
| 4451804 |
Four-terminal network |
May. 29, 1984 |
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