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![]() See also: www.google.com/patents (which allows keyword searching of OCR versions of old Patents). |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() US 2511026. Wadhams, Sateren, Sikorski 1950. Method for Controlling Heating by an Induction Heating Circuit. ![]() US 2611030. Sontheimer 1952. Energy Transfer System. |
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US 2745067. True, Fisk 1956. Automatic Impedance Matching
Apparatus. US 2788396. Abraham 1957. Balancing Arrangement. US 2797387. Adams, Horvath, Parzen 1957. Standing Wave Ratio Monitor. ![]() US 2834887. Brown 1958. Control Systems for Matching Impedance Networks. US 3020529. Turner 1962. Reflected Power Alarm for a Variable Power Output Antenna System. US 3048798. Simons 1962. Directional Coupler. US 3145338. Downs 1964. Combination Transmission System Phase and Impedance Sensor Having a Single Centre-Tapped Probe. US 3281721. Clark 1966. Impedance Matching System. US 3369128. Pearlman 1968. Logarithmic Function Generator. ![]() US 3443231. Roza 1969. Impedance Matching System. US 3683274. Martin 1972. Lumped Component SWR Indicators for RF Transmission Lines. US 3704409. Oomen 1972. Digital Reflection Coefficient Detector. US 3715690. Young, Radler 1973. Automatic Tuning Electric Wave Filter. US 3716806. Zelenz 1973. Signal Coupling Apparatus Utilizing Hybrid Transformer, US 3794941. Templin 1974. Automatic Antenna Impedance Tuner Including Digital Control Circuits. US 3798574. Workman 1974. Directional Coupler Having Directly Connected Taps. US 3835379. Templin 1974. Detector Circuits for Signal Transmission. US 3919643. Templin 1975. Phase Sensor Circuit. US 3919644. Smolka 1975. Automatic Antenna Coupler Utilizing System for Measuring the Real Part of the Complex Impedance or Admittance Presented by an Antenna or Other Network. US 3995237. Brunner 1976. Automatic Matching Method and Apparatus. US 4011529. Garcia 1977. Directional Power Detector for Propagating Waves. US 4015223. Chezé 1977. HF Antenna Matching Device. US 4028645. Tressa 1977. Automatic Impedance Matching Using Resistive and Reactive Diodes. US 4041395. Hill 1977. Transmitter Performance Monitor and Antenna Matching System. US 4075554. Mecklenberg 1978. VSWR Meter Circuit Using Variable RF Attenuator. ![]() US 4156842. Huang, Brooks 1979. Immitance [i.e., Impedance / Admittance] Measurement with High-Frequency Injection and Electromagnetic Coupling. US 4234960. Spilsbury, Spilsbury 1980. Antenna Automatic Tuning Apparatus. US 4283794. Underhill, Lewis 1981. Measuring Radio-Frequency Impedance. US 4285346. Armitage 1981. Electrode System. US 4356458. Armitage 1982. Automatic Impedance Matching Apparatus. US 4463308. Underhill 1984. R.F. Impedance Determination. US 4493112. Bruene 1985. Antenna Tuner Discriminator. |
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US 5150063. Burkhard 1992. Bridge for Measuring the Reflection Coefficient. |
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