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 |
| 7426250 | Automatic gain controller and controlling method thereof An automatic gain controller and the controlling method thereof are disclosed. The automatic gain controller includes a first multiplexer for receiving an input signal and a gain and generating a first output, a second multiplexer for receiving a signal time constan... | 09/16/2008 |
| 7274322 | Systems and methods for automatic gain control for multichannel receivers Apparatus and methods for performing automatic gain control in a radar system. One embodiment of the system includes an attenuator that controls gain of signals received from a radar receiver. A digital signal processor determines coarse gain correction based on dig... | 09/25/2007 |
| 7047832 | Apparatus for measuring gas exchange A container having a port for holding a liquid medium and a reactant that interact to produce a change in gas levels within the container. A removable stopper for insertion into the port creating an airtight seal. A tube extending through the stopper into the contai... | 05/23/2006 |
| 5572452 | Filter with feed-forward AGC A device and method are provided for fully realizing the precision gained internally from a conventional digital signal processor by generating a feed forward automatic gain control (AGC) signal. The feed forward AGC bit is indicative of the output of the... | 11/05/1996 |
| 5481905 | Transducer circuit having negative integral feedback A transducer circuit which includes a Wheatstone bridge balanced by negative integral feedback. The bridge includes responsive elements formed on a thin resilent diaphragm. When subjected to a force, the diaphragm deflects and unbalances the bridge. The u... | 01/09/1996 |
| 5440935 | Apparatus for combining transducer output signals A sensing apparatus for sensing at least two physical quantities is disclosed. The sensing apparatus includes a first transducer that provides a first output signal proportional to a first measured quantity represented and a second transducer that provide... | 08/15/1995 |
| 5230247 | Method of assessing faults in metal tubes having internal helical ribs A method for the detection and evaluation of faults existing on the walls of metal tubes having internal helical ribs includes for each fault signal received by an ultrasonic emitter-receiver ER, the length of the to-and-fro travel completed by the ultras... | 07/27/1993 |
| 5063931 | Method and apparatus for signal dependent gain control A method and apparatus are provided for gain control in a Doppler or other scan system which projects a plurality of scan lines at a given angle to determine velocity of movement of a predetermined medium at the angle. A training line is generated at the ... | 11/12/1991 |
| 4852576 | Time gain compensation for ultrasonic medical imaging systems Time gain compensation is provided on an automatic basis by storing an amplification gain function for an amplifier operating on the received signals and automatically varying the function until the intensity versus time functions of the received signal i... | 08/01/1989 |
| 4691571 | Tissue signature tracking transceiver having upconverted IF amplification An improved ultrasound transceiver providing enhanced imaging by selective filtering of the received signal to provide a variable frequency, constant bandwidth filtering of the received echo signals. The transceiver provides a constant bandwidth filtering... | 09/08/1987 |
| 4676105 | Tissue signature tracking transceiver An ultrasound transceiver providing enhanced imaging by selective filtering of the received signal to provide a variable frequency, constant bandwidth filtering of the received echo signals. The resulting signals are then detected to produce a signal, whi... | 06/30/1987 |
| 4578997 | Time-shaped AGC for ultrasonic liquid level meter of the echo-ranging type An ultrasonic, echo-ranging instrument for measuring the level of liquid in an open channel or tank. The instrument includes a transducer disposed at a fixed position directly above the liquid surface, the nature of the gaseous environment therebetween de... | 04/01/1986 |
| 4545251 | Electronic scanning type ultrasonic non-destructive testing apparatus An ultrasonic non-destructive testing apparatus of the electronic scanning type comprising transmitter for producing exciting pulses in response to a predetermined timing pulse, a probe coupled to said transmitter, having a plurality of transducers for tr... | 10/08/1985 |
| 4513621 | Ultrasonic test instrument with controllable amplifier The invention relates to an ultrasonic test instrument, in which a receiver amplifier is controlled in dependence upon time by means of a depth compensation signal or else the ultrasonic signal amplified independently of the depth is evaluated by means of... | 04/30/1985 |
| 4452085 | Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like A time gain control (TGC) signal for a variable gain amplifier in an ultrasonic scanner is derived by determining the attenuation at many levels in the object under examination and then constructing the TGC signal based on the cumulative attenuation of an... | 06/05/1984 |
| 4451909 | Ultrasonic wave distance detection system In an ultrasonic wave distance detection system, an ultrasonic wave pulse radiated into the selected area is reflected on an object. Said reflected ultrasonic wave pulse is partly received by an ultrasonic wave transducer. The received signal is supplied ... | 05/29/1984 |
| 4402231 | AGC Amplifier for ultrasonic measuring system An ultrasonic flow rate measuring system in which a pulse of ultrasonic energy is emitted by a transducer placed on a pipe conducting the fluid to be metered, the energy being propagated through the fluid and being picked up by a second transducer at a di... | 09/06/1983 |
| 4398261 | Device for measuring the level of a variable signal with logarithmic conversion A device for measuring the level of a variable signal delivered by a sensor. It comprises a series of attenuators, receiving the signal from the sensor, a squaring and integrating chain for converting the value of the signal delivered by the attenuators i... | 08/09/1983 |
| 4378596 | Multi-channel sonic receiver with combined time-gain control and heterodyne inputs In a receiver for pulsed ultrasonic beams, it is sometimes desirable to translate the received signal to a lower carrier frequency by a heterodyne process. It is also often desirable to vary the receiving channels' gain during the period when signals are ... | 03/29/1983 |
| 4375166 | Ultrasound examination apparatus comprising a mosaic of transducers of an electrostrictive material An ultrasound examination apparatus comprises a processing circuit for echo signals from a mosaic of ultrasonic transducers which are made of an electrostrictive material with a non-remanent polarization. These signals are applied to processing channels w... | 03/01/1983 |
| 4356731 | Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like Time gain compensation is provided in an ultrasonic scanner by storing a digital code in memory representing the desired signal gain for intervals of time during the reflected wave. Gain compensation due to transducer parameter can be provided in digital ... | 11/02/1982 |
| 4248091 | Ultrasonic pulse-echo apparatus For use in an ultrasonic pulse-echo apparatus including an ultrasonic wave transducer for transmitting an ultrasonic wave into an object to be examined and for producing a first image signal corresponding to echo pulses reflected from the interior of the ... | 02/03/1981 |
| 4228688 | Accurate distance amplitude compensation A function generator provides a voltage vs. time curve which is also applied to the oscilloscope and is adjusted by the operator to conform to the peak amplitudes of the displayed electrical pulses. During subsequent testing, this voltage function is appl... | 10/21/1980 |
| 4205555 | Ultrasonic diagnostic apparatus An ultrasonic diagnostic apparatus is provided comprising a clock pulse generator, and electro-acoustic transducer which responds to the clock pulse from the clock pulse generator to produce an ultrasonic wave, a receiving circuit for receiving the electr... | 06/03/1980 |
| 4145741 | Signal processing arrangements For systems, such as ultrasonic investigative systems, analyzing pulses received after transmission or reflection, it is known to apply swept gain to the received signal to overcome loss in propagation. This is achieved in this invention by converting the... | 03/20/1979 |
| 4140107 | Echoscope for examination of objects An echoscope for examination of objects with the aid of an ultrasound beam, comprising at least one electro-acoustic element for transmitting and receiving ultrasonic pulses during a transmission-reception period divided into n consecutive time intervals.... | 02/20/1979 |
| 4016862 | Echoscope for examination of objects An echoscope for examination of objects with the aid of ultrasonic pulses, comprising at least one electroacoustic element for transmitting and receiving ultrasonic pulses during a transmission-reception period divided into n consecutive time intervals. T... | 04/12/1977 |
| 3996792 | Supersonic wave flaw detecting apparatus A supersonic or ultrasonic wave flaw detector in which acoustic boundaries of flaws and/or abnormality of materials within an object to be inspected is detected by supersonic or ultrasonic waves and the position and shape of such a flaw and/or abnormality... | 12/14/1976 |
| 3964297 | Ultrasonic inspection apparatus Trains of echo signals occurring from repetitively transmitted ultrasonic pulses are stored in a shift register in accordance with their times of occurrence, and the stages of the shift register are connected to illuminate respective light-emitting diodes... | 06/22/1976 |
| 3942361 | Arrangement for testing thick-walled specimens by the ultrasonic pulse-echo method In an ultrasonic pulse-echo test arrangement which is particularly suited for testing heavy-walled workpieces, a plurality of transducer probes are used. Two or more transmitting transducer probes are arranged so that each probe transmits its sound beam t... | 03/09/1976 |
