Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 7331102 | Apparatus for detecting an amount of strain and method for manufacturing same An apparatus for detecting an amount of strain comprises a strain generating part, an electrical insulating layer and sensing elements. The strain generating part is a member to which strain is to be applied. The electrical insulating layer is formed on the strain g... | 02/19/2008 |
| 7276892 | Resonator based spectrum analyzer and method A spectrum analyzer includes an array of frequency-selective bulk acoustic wave (BAW) resonators each tuned to a predetermined different resonant frequency. The spectrum analyzer further includes a broadband BAW resonator that generates acoustic energy when connecte... | 10/02/2007 |
| 7248866 | Frequency selective load pull tuner and method An automatic, frequency selective microwave tuner, used for load pull transistor testing, is capable of generating independently controllable reflection factors, both in amplitude and phase, at several, harmonic or not, frequencies simultaneously. The tuner employs ... | 07/24/2007 |
| 7134339 | Acceleration sensor A compact, high-sensitivity acceleration sensor that is prevented from being affected by factors other than acceleration, such as a change in temperature, has a bimorph acceleration-sensor element including first and second resonators attached to opposite sides of a... | 11/14/2006 |
| 7102457 | Mechanically balanced microwave load pull tuner A mechanically balanced automatic microwave tuner is used in on-wafer device testing. Using low loss rigid airlines to connect the tuner and the devices improves the tuning range at the DUT reference plane but causes mechanical movements of the wafer probes, when th... | 09/05/2006 |
| 7053628 | High reflection microwave tuner using metal-dielectric probe and method Combination metal-dielectric microwave probes are sliding on the central conductor of an electro-mechanical microwave two-probe load pull tuner and create higher reflection factor over a wider frequency bandwidth than was previously possible using pure dielectric pr... | 05/30/2006 |
| 7034629 | High frequency, high reflection pre-matching tuners with variable zero initialization Automatic microwave pre-matching tuners with new zero positioning capability allowing for a minimum idle airline section between pre-matching and tuning section, thus minimizing insertion loss and enhancing high reflection tuning capability at high frequencies and t... | 04/25/2006 |
| 7013709 | High throughput preparation and analysis of plastically shaped material samples A rapid throughput method for the preparation, analysis or both of libraries of material samples is provided. According to the method, a plurality of samples is provided. The plurality of samples is then formed into a plurality of films. Thereafter, the plurality of... | 03/21/2006 |
| 6998836 | Low loss integration of wafer probes with microwave tuners This invention relates to the reduction of insertion losses and by consequence maximization of reflection factors for on-wafer load pull testing of high power or low noise transistor chips, using as much a direct integration as possible between the slotted airline o... | 02/14/2006 |
| 6973844 | Semiconductor mechanical quantity sensor A semiconductor mechanical quantity sensor includes two sensor chips (100a, 100b) having the same structure and the same characteristics formed on semiconductor substrates (10a, 10b), arranged on a circuit chip... | 12/13/2005 |
| 6972553 | Sensor readout circuit A sensor readout circuit which provides a frequency signal output including a phase detector circuit responsive to an output signal from a sensor and an input signal to the sensor and configured to detect the phase difference between the input signal and the output ... | 12/06/2005 |
| 6861854 | Peizoelectric microactuator and sensor failure detection in disk drives A test device and method for testing one of a disk drive microactuator and a disk drive sensor that includes two piezoelectric elements. The test device includes a signal generator, signal analyzer, and a user interface. The test device is operational to provide a r... | 03/01/2005 |
| 6774614 | Method and apparatus for detecting current An apparatus for detecting currents in a three-phase power transmission system includes a first detection circuit electrically coupled to a first phase of the three-phase transmission system, a second detection circuit electrically coupled to a second phase of the t... | 08/10/2004 |
| 6674291 | Method and apparatus for determining and/or improving high power reliability in thin film resonator devices, and a thin film resonator device resultant therefrom The effects of electromigration have been shown to lead to damage of metal electrodes of electronic devices such as thin film resonator (TFR) devices in only a few hours, for a test input power that is within the operational range of these devices. It has... | 01/06/2004 |
| 6650102 | High throughput mechanical property testing of materials libraries using a piezoelectric The present invention provides instruments and methods for screening combinatorial libraries that addresses many of the problems encountered when using conventional instruments. For example, the disclosed instruments can measure mechanical properties of l... | 11/18/2003 |
| 6518778 | Method of determining angle-of-cut Methods are included for determining deviations from $c;=0° in test resonators based on the quasi-pure modes' displacement ratio variations with $c; angle. A direct relationship between deviation from $c;=0° and the c-mode displacement ratio ha... | 02/11/2003 |
| 6515465 | Method and apparatus for measuring harmonic load-pull for frequency multiplication A method for measuring harmonic load-pull including supplying a fundamental frequency signal to a frequency multiplication device under test and obtaining a target even-order multiplied frequency signal. The fundamental load impedance and an even-harmonic... | 02/04/2003 |
| 6489776 | Non-contact mechanical resonance method for determining the near surface carrier mobility in conductors An apparatus using a resonator probe for determining an electronic property of a conductor across a dielectric. The apparatus has a device for inducing lateral mechanical oscillations of the resonator probe and a voltage source for producing a voltage dif... | 12/03/2002 |
| 6462530 | Redundant rate sensor and method Redundant rate sensor and method in which inertial rate is monitored with a plurality of vibratory sensing elements mounted in a single enclosure, signals from the sensing elements are processed to provide an independent rate output signal for each of the... | 10/08/2002 |
| 6320471 | Method and device for computer supported determination of an oscillating region of an electrical circuit An electrical circuit having an oscillator and additional structural elements that are connected to the oscillator. In an iterative method, upon variation of circuit parameters of the additional structural elements, the following steps are carried out for... | 11/20/2001 |
| 6307287 | High-efficiency moving-magnet loudspeaker A thermoacoustic driver incorporates a linear electrodynamic motor having electrical terminals and a moving part, a driver suspension housing, a piston, and a stiffness-enhancing device for raising the mechanical resonance frequency of the electrodynamic ... | 10/23/2001 |
| 6292002 | Crystal resonant frequency sensor A method and apparatus for measuring the frequency of a desired resonant mode of a crystal arrangement, or other two-port device, during an automated operation. The crystal arrangement, or other two-port device, is placed into a test circuit and subjected... | 09/18/2001 |
| 5852794 | Multiple frequency unambiguous phase detector for phacoemulsification system A method for determining the voltage current phase relationship of a piezoelectric phacoemulsification handpiece includes the steps of obtaining an AC voltage signal corresponding to the operating AC voltage of a piezoelectric handpiece and obtaining an A... | 12/22/1998 |
| 5644299 | Ultrasonic material level measurement Apparatus for indicating material level that includes a pair of ultrasonic transducers on opposed sides of a space for receiving the material at the level to be detected. A swept frequency oscillator is coupled to one of the transducers so that the transd... | 07/01/1997 |
| 5594354 | Method for measuring selected frequencies of a coupled-dual resonator crystal The present invention discloses a method for obtaining frequency parameters to determine the resonator frequencies, the synchronous peak separation frequency, and the normal center frequency of a coupled-dual resonator crystal. Under this method, a plural... | 01/14/1997 |
| 4918372 | Method of measuring the thermal hysteresis of quartz crystal resonators The thermal hysteresis of quartz crystal resonators is measured by exciting two modes of a quartz crystal of interest with an external frequency source at a preselected temperature, calculating the difference frequency as between the modes, resetting to t... | 04/17/1990 |
| 4858159 | Frequency-tuneable filter calibration An apparatus and method for calibrating a yttrium-iron-garnet-tuned filter (YTF) is disclosed. Instead of using both tune+span information from the 1st LO, only the sweep ramp used to span the 1st LO is used for the YTF's s own swept spans, and the YTF ha... | 08/15/1989 |
| 4649336 | Automatic, self sustaining probe for measuring the work function An apparatus for measuring changes in the work function of a surface using a method devised by Kelvin and known as the "dynamic capacitor method". This apparatus comprises a system for monitoring and automatically regulating the vibration of a Kelvin prob... | 03/10/1987 |
| 4632501 | Resonant electromechanical oscillator A resonant electromechanical oscillator which includes a base portion, a driven portion, a cantilevered sheet-form flexural suspension which spaces the driven portion from the base portion for oscillation about an axis in the plane of the sheet-form suspe... | 12/30/1986 |
| 4614919 | Magnetostatic wave frequency analyzer apparatus A magnetostatic wave frequency analyzer apparatus utilizing forward volume waves. A single input transducer is arranged opposite a plurality of output transducers to receive the different frequencies of the generated magnetostatic forward volume wave. A g... | 09/30/1986 |
| 4481857 | System for tuning musical instruments A method and apparatus including electronic circuitry for tuning a musical instrument. When a tunable vibratory or frequency producing element of the instrument is actuated, the oscillations thereby created are converted into an electrical signal. This si... | 11/13/1984 |
| 4448059 | Engine vibration sensor An improvement in an engine vibration sensor of the type including a vibrator set to resonate at a specific frequency of vibration of the engine to which it is attached, for example the engine knocking vibration frequency, wherein the vibration of the vib... | 05/15/1984 |
| 4447782 | Apparatus for automatic measurement of equivalent circuit parameters of piezoelectric resonators A heterodyne zero-phase detector (A) produces a phase output signal whose phase varies with the phase difference between a selectively variable test signal and the same selectively variable test signal as modified by being applied to a piezoelectric reson... | 05/08/1984 |
| 4412172 | Method of measuring the thermal properties of a resonator The thermal properties of a crystal resonator are rapidly and inexpensively measured by first immersing the resonator into an ice water bath at 0° C. and monitoring the frequency of the resonator until the frequency of the resonator is no longer changing... | 10/25/1983 |
| 4314393 | Method of manufacturing acoustic surface wave device A method of manufacturing an acoustic surface wave device comprising: forming two pairs of transducers, a multistrip coupler and lead patterns for electrically shorting at least one pair of the transducers on a piezoelectric material; mounting the piezoel... | 02/09/1982 |
| 4299114 | Method of testing the integrity of an ultrasonic system for sensing liquid-fluid interfaces An ultrasonic system for sensing a liquid-fluid interface comprises a support structure (10) to which a transmitting crystal (21) and a receiving crystal (22) are bonded in such a way that the crystals (21 and 22) are positioned opposite each other across... | 11/10/1981 |
| 4131852 | Single dispersive delay line compressive receiver A wideband compressive receiver using only one surface acoustic wave (SAW) device in a time-multiplexed fashion. A short pulse into the SAW device generates a "downchirp" local oscillator sweep signal which, after appropriate band limiting, is mixed with ... | 12/26/1978 |
| 4112360 | Apparatus and method for tuning electro-mechanical filter components Apparatus and method for tuning components of an electrical mechanical filter which includes a plurality of mechanical resonators coupled together with input and output resonators and other resonators mounted between the input and output resonators which ... | 09/05/1978 |
| 4093914 | Method of measuring parameters of a crystal filter Dual resonator crystal filters have an input electrode, a common electrode, and an output electrode which provide two resonators coupled together. Mathematical formulas were derived to determine the resonator frequencies, the synchronous peak separation f... | 06/06/1978 |
| 4034288 | System for measuring the frequency of an electrical signal The present invention relates to system for measuring the frequency of an electrical signal. The device in accordance with the invention comprises, deposited upon a piezo-electric substrate a transducer array in the form of interdigital comb structures wh... | 07/05/1977 |
