Celebrity Inventors
Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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 |
| 7231151 | Cosite interference rejection system using an optical approach A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled t... | 06/12/2007 |
| 7215247 | Spatial position determination system A system is disclosed that determines a spatial position of a tracker device relative to an object sending a return signal to the tracker. Such a system advantageously maintains phase accuracy between a forward signal from the tracker device and the return signal fr... | 05/08/2007 |
| 7142933 | Apparatus for determining performance-indicating numbers in sports games, particularly in ice-hockey A system and method for determining a performance-indicating statistic for a goal based sports game, the sports game involving time, the method comprising: storing at least one sports game box score, the at least one box score representing a performance in the sport... | 11/28/2006 |
| 7042959 | DSP-based variable aperture code generation technique Variable Aperture Coded (VAC) signals for VAC modulation are advantageously generated by a digital signal processor (12) that yields a VAC signal having a single narrow peak in the positive frequency region. A Discrete-Time Hilbert transformer (12) iso... | 05/09/2006 |
| 7031336 | Space-time-power scheduling for wireless networks A technique is disclosed to schedule frame transmissions in a wireless network. The network includes a plurality of stations configured to communicate on the same frequency channel with a plurality of access points. A central controller examines the transmission cha... | 04/18/2006 |
| 7012977 | System, method and apparatus for wireless channel parameter estimation in spread spectrum communication systems The present invention provides a system, method and apparatus for estimating channel parameters in spread spectrum communication systems. A first method is accomplished by receiving a base station signal and then demodulating the base station signal. After demodulat... | 03/14/2006 |
| 6633752 | Base band signal offset correcting circuit for FSK receiving apparatus and method thereof An FSK receiving apparatus has, as means for performing offset correction upon a demodulated base band signal, a second low pass filter 9 for integrating the demodulated base band signal; a window comparator for detecting a DC offset component in an outpu... | 10/14/2003 |
| 5950118 | Wide bandwidth discriminator for use in a radio receiver A wide bandwidth frequency discriminator circuit (200) employs a wide bandwidth limiting amplifier (202) to amplify the IF signal portion of a received RF signal. A frequency-to-voltage circuit 208 is provided having a bandwidth substantially greater than... | 09/07/1999 |
| 5905777 | E-mail paging system E-Mail messages transmitted over an E-Mail network are routed to an E-Mail server servicing the recipient, where useful E-Mail messages can be identified, separated from the junk mail, and forwarded as directed by the recipient. The E-Mail server sends a ... | 05/18/1999 |
| 5875389 | SSB radio receiver An SSB radio receiver having an inexpensive wide-band IF filter which passes through not only a reception objective SSB station IF signal but also an interference SSB station IF signal simultaneously. These signals are SSB-detected to reproduce the origin... | 02/23/1999 |
| 5697086 | Co-channel FM signal/interference canceller A combination of two phase-lock loops, and a cancellation circuit are used to remove a dominant FM signal from within a signal environment. The two phase-lock loops together produce a replica of the highest power (i.e. dominant) FM signal. The cancellatio... | 12/09/1997 |
| 5615411 | Method and apparatus for composite signal separation and FM demodulation A composite signal recognizer, separator, and FM demodulator apparatus for processing received radio signals. The receiver utilizes N demodulators to process a received signal, where N is equal to or greater than the number of co-channel signals or percei... | 03/25/1997 |
| 5608390 | Synchronous telemetry channel The invention concerns pen-based computers, wherein a pen, or stylus, is positioned on a display of the computer, and produces a signal which allows the computer to detect the position of the stylus. The stylus produces a second signal, which is used as a... | 03/04/1997 |
| 5554955 | Method and apparatus for removing the effects of co-channel interference from the message on a dominant frequency modulated carrier and for recovering the message from each of two co-channel carriers Method and apparatus for improving an estimate of a message being carried by a frequency modulated dominant carrier in the presence of co-channel interference from a subdominant carrier. An envelope detector provides an envelope signal E(t). A frequency d... | 09/10/1996 |
| 5339456 | Method and circuit for non-cooperative interference suppression of radio frequency signals This invention provides a method and circuit for separating a signal of interest from an angle modulated interfering signal in which a composite signal, including the signal of interest and the interfering signal, is used to produce first and second signa... | 08/16/1994 |
| 4992747 | Multiple reuse of an FM band A signal receiving system for receiving messages from each of several unequal amplitude FM carriers occupying the same portion of the frequency band. The signal receiving system receives power division multiplexed signals, each of which being allocated a ... | 02/12/1991 |
| 4878251 | Interference signal suppressor for a radio receiver An FM interference suppressor comprises two FM demodulators, one of which is fed with an input signal via an envelope detector and is arranged to feed a zero frequency detector and a phase inverter to produce a baseband composite signal comprising wanted ... | 10/31/1989 |
| 4859958 | Multiple reuse of an FM band A signal receiving system for receiving messages from each of several unequal amplitude FM carriers occupying the same portion of the frequency band.... | 08/22/1989 |
| 4635298 | Interference wave detection circuit for use in radio receiver An interference wave detection circuit is designed so as to detect whether a beat due to the difference between two carrier wave frequencies is included or not in a received signal for a radio receiver. The detection circuit comprises circuitry for derivi... | 01/06/1987 |
| 4590615 | Multipath distortion reducing circuit A multipath distortion reducing circuit particularly adapted for use with stereophonic receiving circuits in which the amount of mixing between right and left channels is reduced. In accordance with the invention, the envelope of the received FM signal is... | 05/20/1986 |
| 4525868 | Interference wave detection circuit for use in radio receiver An interference detector for use in determining when two carriers are producing a beat signal, comprising a low frequency automatic gain control amplifier 1' amplifying the received signal, a demodulator 5 and voice detector 6 for determining if the recei... | 06/25/1985 |
| 4408350 | Enhanced selectivity signal receiver In a reception system which includes a receiver having a plurality of inter-connected stages and a demodulator, and where there appears at an input of the receiver a desired signal which occupies substantially a predetermined bandwidth, and at least one u... | 10/04/1983 |
| 4380082 | Digital signal receiver with FM interference elimination capability The invention eliminates an FM interference from a digital signal when the interference occurs because the FM and digital signals are transmitted over adjacent routes and sharing a common frequency band. An error detector finds a difference between a dete... | 04/12/1983 |
| 4249261 | Superheterodyne radio receiver with nearby-station interference detection In a superheterodyne radio receiver, by observing the RF and IF signal levels is detected an occurrence of an interference caused by an interfering strong signal of an adjacent station at a frequency close to that of a desired station signal to be receive... | 02/03/1981 |
| 4166251 | System for removing interference distortion in the demodulated signal of a frequency-modulated signal A system comprising a demodulator for demodulating an input FM signal which has been subjected to interference by another FM signal, an envelope detector for detecting the envelope of fluctuation of the amplitude of the input signal, an AGC circuit for co... | 08/28/1979 |
| 4027264 | Phase lock loop multitone interference canceling system An interference canceling system in which a phase lock loop is utilized as narrow band tracking filter to adaptively lock to interference tones to be canceled by a process of signal subtraction.... | 05/31/1977 |
