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A small umbrella which may be removably attached to a beverage container in order to shade the beverage container from the direct rays of the sun.
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| Number | Title | Issue Date |
| 7358829 | Transmission apparatus, communication apparatus and mobile radio apparatus Transmission apparatus capable of reducing distortion of the vector modulation wave that is the transmission output to a sufficiently small level is provided. An amplifying section (105) generates a vector modulation wave based on an amplitude component modul... | 04/15/2008 |
| 6822523 | Power modulator and method of operating a power modulator To address the need for a power modulator that can efficiently operate within a wideband, high-speed communication system, a method and apparatus for power modulation is provided herein. In accordance with the preferred embodiment of the present invention an envelop... | 11/23/2004 |
| 5859876 | Method and apparatus for improving AM compatible digital broadcast analog fidelity A digital signal transmission system is provided which minimizes the AM signal envelope distortion caused by multiple digitally modulated carriers in the same band as the AM signal. The system transmits an amplitude modulated signal. Digital carriers for ... | 01/12/1999 |
| 5798674 | Band Limited AM modulator using linear power amplification A band limited Amplitude Shift Keyed (ASK) modulator employing linear modulation and an efficient Class C power amplifier. Band-limited operation is provided by filtering a digital baseband input signal prior to modulation. Closed loop feedback is employe... | 08/25/1998 |
| 5187719 | Method and apparatus for measuring modulation accuracy A method and apparatus for determining the phase and amplitude accuracy of continuous-phase-modulated signals is described. A modulated RF signal generated by a transmitter is down converted to a relatively low intermediate frequency which is filtered and... | 02/16/1993 |
| 4604559 | Apparatus and method for providing useful audio feedback to aid in the operation of remotely controlled powered manipulators The user of a remotely controlled, powered manipulator is provided with audible feedback signals which provide useful information relating to the force and speed of the motor. An audio tone is generated and is frequency modulated by a signal which corresp... | 08/05/1986 |
| 4366482 | Transmitter with buzzer A garage door opener system includes a radio receiver actuable by reception of a preselected radio signal for moving a garage door between opened and closed positions and a portable hand-held transmitter manually actuable to transmit such preselected radi... | 12/28/1982 |
| 4234964 | Radio receiver monitoring and testing apparatus Circuitry for attachment to a radio receiver to monitor and test a detected intermediate frequency signal and an audio signal from a demodulator portion of the receiver to determine whether a transmitted radio frequency signal is within frequency toleranc... | 11/18/1980 |
| 4143323 | Radio receiver monitoring and testing apparatus Circuitry for attachment to a radio receiver to monitor and test a detected intermediate frequency signal and an audio signal from a demodulator portion of the receiver to determine whether a transmitted radio frequency signal is within frequency toleranc... | 03/06/1979 |
| 4088956 | Automatic modulation percentage control for amplitude modulated transmitters An automatic modulation percentage control for amplitude modulated transmitters wherein a percentage detection circuit responsive to a sample signal from the transmitter and functioning at a selected modulation percentage generates a gain-reduction bias f... | 05/09/1978 |
| 3990011 | Method and apparatus for determining AM modulation factor The modulation factor for an AM signal wherein the modulation signal is an A. C. wave is determined by demodulating the AM signal, obtaining the average D. C. level and peak deviation therefrom for the demodulated signal and then dividing the latter by th... | 11/02/1976 |
