Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7546097 | Calibration techniques for frequency synthesizers In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase lo... | 06/09/2009 |
| 7149477 | Radio-parameter control in mobile radio communications system A radio-parameter control method allowing fine radio-parameter setting to improve communication quality is disclosed. Fixed stations are distributed at predetermined locations in a service area. A fixed station monitors reception condition of a pilot channel signal ... | 12/12/2006 |
| 6980776 | Transceiver apparatus The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit section thereof are balanced circuits. The transceiver apparatu... | 12/27/2005 |
| 6625428 | Voltage standing-wave ratio measurement apparatus and use in a cellular communications system An apparatus for monitoring a cellular communications system; comprising a plurality of voltage standing-wave ratio (VSWR) measurement means located at respective connections to antennas of said communications system and at respective discontinuities in r... | 09/23/2003 |
| 6058294 | Adjustable frequency stabilizing internal chip capacitor system A transmitter system having an adjustable monolithic frequency stabilization and tuning internal capacitor circuit. The transmitter system has a transmitter for generating and transmitting a transmitter oscillator frequency signal. A data generating chip ... | 05/02/2000 |
| 5990736 | High frequency amplifier with a guard circuit and a radio wave transmission apparatus including the same A high frequency power amplifier including: a multi-layer printed-circuit board, a transistor for amplifying an input signal and outputting the amplified signal, a first print circuit pattern for receiving the input signal and supplying the input signal t... | 11/23/1999 |
| 5818880 | MMIC telemetry transmitter A telemetry transmitter having a dielectric resonator for frequency stabilization, a frequency or phase shift keying modulator and a high efficiency power amplifier. The transmitter can be implemented on gallium arsenide or other kinds of substrates The t... | 10/06/1998 |
| 5532651 | Tunable voltage controlled oscillator having microstrip resonator with cuts for better tuning An oscillator (100) includes a resonator (218) having a mirco-strip (217). The micro-strip (217) couples an inductive component (221) to a capacitive portion (219). To tune the oscillator (100), a number of cuts are made on the pad (221) in order to restr... | 07/02/1996 |
| 5301361 | Low parts count transmitter unit A frequency modulated (FM) transmitter for use in the 100 to 300 megacycle band is described having a low parts count topology. The disclosed topology requires the use of five tank circuits tuned to various frequency multiples of a crystal oscillator to a... | 04/05/1994 |
| 4772870 | Power line communication system A low-level, low-power radio frequency (RF) communications system designed to operate as a point-to-point power line communications sytem (PLC) utilizing frequencies from 50 to 600 MegaHertz (MHz) superimposed onto the AC power signal in a building.... | 09/20/1988 |
| 4736454 | Integrated oscillator and microstrip antenna system A three-element active device is physically and electrically integrated (e.g., by soldering) onto shaped conductive areas in a thin conformable microstrip structure which includes a microstrip antenna radiator. Two of the elements of the active device are... | 04/05/1988 |
| 4628538 | Television transmission system using overmoded waveguide A television transmission system for transmitting UHF signals from a UHF signal generator, the system comprising an antenna for radiating UHF signals generated by said UHF signal generator, an overmoded section of waveguide for carrying the signals at lea... | 12/09/1986 |
| 4453269 | Apparatus for improving the frequency stability of a transmitter oscillator circuit A novel apparatus and method for improving the stability of an electrical circuit such as an oscillator and/or a radio frequency transmitter which is coupled to a radiating element wherein the radiating element such as a loop is coupled to the inductor or... | 06/05/1984 |
| 4228539 | High frequency transmitter The components of a transistor oscillator are mounted on an end cap rotatably mounted on the outer tube of a cavity resonator which stabilizes the oscillator. The intensity with which a high frequency is applied to the cavity resonator is adjustable by ro... | 10/14/1980 |
| 4158182 | Low noise oscillator circuit A low noise, high frequency oscillator (50) is disclosed which includes a JFET (100) having a tuned circuit (102) connected in a feedback arrangement with it. The JFET is operated in a self-biasing mode and includes a gate biasing circuit (104) comprised ... | 06/12/1979 |
| 4097823 | Transmitter wherein outputs of a plurality of pulse modulated diode oscillators are combined An improved solid state transmitter (and elements therefor) adapted particularly well to pulsed operation at radio frequencies is disclosed. Such transmitter includes the combination of: A crystal-controlled oscillator producing a continuous wave output s... | 06/27/1978 |
| 4070627 | Double tuned input circuit for television transmitter amplifier A substantially constant impedance is developed across the input terminals of a linear amplifier used in a very high frequency (VHF) low band television transmitter. The input circuit consists of lumped components arranged in a capacitively coupled double... | 01/24/1978 |
| 4025855 | Multi-channel R.F. transducer with channel selector coupled to selected channel filter A voltage variable filter circuit useful, for example, in a radio frequency transmitting device and having a center frequency which is changeable with changes in an applied voltage employs one or more voltage variable reactive elements in the filter in co... | 05/24/1977 |
