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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 4373504 | Gas burner convection oven A convection oven in which vapor is circulated through the oven by a pair of counter rotating blowers positioned in the rear of the oven which draw vapor from the oven along with combustion products from a multi-section ribbon burner which has a secondary... | 02/15/1983 |
| 4373653 | Method and apparatus for ultrasonic bonding A method and apparatus for providing high reliability ultrasonic bonds by monitoring the force required to separate the bonding tool from the wire after the bonding operation. This force which is required to break an incidental bond between the tool and t... | 02/15/1983 |
| 4371770 | Adjustable microwave oven door seal A door seal for a microwave oven wherein the distance between the choking structure in the door and a substantially planar surface around the periphery of the access opening can be independently adjusted at a plurality of locations around the periphery. T... | 02/01/1983 |
| 4370596 | Slow-wave filter for electron discharge device A filter for suppressing backward wave energy modes propagating along a slow-wave structure. The filter is frequency responsive and comprises a wall having coupling apertures and, in one embodiment, a series of waveguide sections which are joined to the c... | 01/25/1983 |
| 4362917 | Ferrite heating apparatus A microwave heating appliance having a metallic member supporting a body comprising ferrite bonded to an outer surface of the metallic member with a grooved inner surface of the metallic member contacting a food body to be heated by thermal energy generat... | 12/07/1982 |
| 4358653 | Combination microwave oven A combination microwave and electrically heated oven having a door with a high temperature seal which inhibits the escape of hot gases around the periphery of the door and which is isolated from the major portion of the electric fields of the microwave en... | 11/09/1982 |
| 4350859 | Microwave oven feed system A microwave oven feed system having the output probe of the magnetron inserted directly into the microwave enclosure. A rotating feed structure positioned within the enclosure couples the microwave energy from the probe into a directive radiation pattern ... | 09/21/1982 |
| 4347210 | Method of forging spinel domes A method of forging spinel into complex shapes in which a spinel plate is placed in a mold while the spinel plate is heated, in an atmosphere of helium, to a temperature below its melting point and above its solid two phases transition point that allows p... | 08/31/1982 |
| 4342896 | Radiating mode stirrer heating system A microwave heating system having a rotary multiport microwave radiator positioned in a cavity and having radiating ports at different distances from the axis of rotation which direct overlapping radiation patterns at a body to be heated. A combination he... | 08/03/1982 |
| 4339751 | Marine radar including anticollision unit A bright display radar system having anticollision capabilities in which received signals are digitized at a rate determined by a radar range setting and displayed at a constant relatively slow rate independent of the range setting. A computer based antic... | 07/13/1982 |
| 4335290 | Microwave oven blower radiator A microwave heating system having a combination rotary blower and multiport microwave radiator positioned in a cavity and having radiating ports at different distances from the axis of rotation which direct overlapping radiation patterns at a body to be h... | 06/15/1982 |
| 4331124 | Flue aspirated oven A gas-fueled oven which is capable of safely assuming high temperatures such as occur during pyrolytic self-clean cycles and which employs a single multi-purpose fan for directing cool air flows over wall surfaces, for providing aspiration and temperature... | 05/25/1982 |
| 4326799 | Active-passive scanning system A scanning system combining active and passive detection of radiation from targets. In the active mode, a laser beam is scanned with a rotating wedge in a downward looking Palmer pattern, a portion of the beam is reflected from targets, and coherent detec... | 04/27/1982 |
| 4327277 | Method for laser soldering A method for simultaneously soldering the two solder covered ends of an electronic chip component to respective conductor pads. Pulsed coherent laser radiation having a predetermined energy profile is separated into two spacially separate beams and they a... | 04/27/1982 |
| 4321567 | Combining series sections weighting with withdrawal weighting in SAW transducers A transducer for a SAW device having withdrawal weighting combined with series sections weighting to achieve a desired frequency response. Withdrawal weighting is employed where the impulse response can be adequately approximated by a withdrawal pattern w... | 03/23/1982 |
| 4320467 | Method and apparatus of bus arbitration using comparison of composite signals with device signals to determine device priority A bus arbitration method and apparatus for determining which of a plurality of devices desiring access to a common bus will gain access to the bus when it becomes available. Using the change of state of a common BUSY line to synchronize the simultaneous i... | 03/16/1982 |
| 4317017 | Microwave steamer A utensil for steam cooking in a microwave oven. The bottom portion of the utensil is a microwave transparent dish in which water is placed. A metal pan having a plurality of holes in the bottom is supported in the dish in a fixed horizontal alignment wit... | 02/23/1982 |
| 4312117 | Integrated test and assembly device A semiconductor integrated circuit device of the beam lead type having a semiconductor interconnection substrate with apertures for integrated circuit chips therein and with metallization patterns having sharply pointed ends for penetrating oxide layers o... | 01/26/1982 |
| 4311384 | Laser scanning system A scanning laser doppler system in which the change in angle between transmitted and received beams caused by the finite transit time to the target is automatically compensated. The scanning beam is produced as a downward looking Palmer scan pattern by an... | 01/19/1982 |
| 4311385 | Coherent detection lag angle compensated scanning system independent of inhomogeneities of the detector A coherent detection scanning laser system having an optical system that compensates for the angular deviation of the received signal resulting from the scanning process, and having a detection system with output independent of spatially varying sensitivi... | 01/19/1982 |
| 4310839 | Interactive display system with touch data entry An interactive tabular display system having thin membrane switches positioned on the display surface around the periphery. The switches are categorized as select or function depending on the particular application software program in use. Touching one of... | 01/12/1982 |
| 4296298 | Dielectric cooking apparatus A dielectric heating oven having a set of parallel spaced electrodes alternately grounded and every ungrounded electrode fed by electromagnetic energy from a common source in an ISM band preferably from 13.56 megacycles to 40.68 megacycles. Food is placed... | 10/20/1981 |
| 4287506 | Voltage generator with self-contained performance monitor A system for the generation of a set of voltages, such as the X and Y coordinate voltages of a display or automated milling machine, includes a character generator and a character positioning circuit which, in turn, are responsive to digital control signa... | 09/01/1981 |
| 4286135 | Compact microwave isolator A resonance isolator in which microwave ferrite bars are positioned in and in contact with a waveguide to achieve unilateral absorption and in which ceramic permanent magnet bars are positioned on the outside of the waveguide adjacent to the ferrite bars ... | 08/25/1981 |
| 4284329 | Laser gyroscope system A four-frequency laser gyroscope system having improved accuracy is constructed using a single solid block of low thermal coefficient of expansion material. A four-segment nonplanar propagation path provides a first frequency splitting. A second splitting... | 08/18/1981 |
| 4271412 | Range tracker utilizing spectral analysis A radar system transmits a signal to a target wherein the frequency is modulated with a sinusoidal modulation pattern. The difference between the actual target range and an estimate thereof is subjected to a spectral analysis wherein the spectral terms ar... | 06/02/1981 |
| 4270105 | Stabilized surface wave device A surface acoustic wave (SAW) device is provided with short-term and long-term stability by recessing the electrode structure into the surface of the piezoelectric crystal of the device. In addition, the surface is passivated with the silicon polymer, and... | 05/26/1981 |
| 4270204 | Multiplexer circuit A multiplexer circuit is disclosed wherein a diode ring circuit is coupled to a pair of logical signal sources and a first winding of a transformer. A second winding of the transformer is coupled to a control signal source. One of the pair of logical sign... | 05/26/1981 |
| 4267596 | Digital memory system A digital memory system adapted to store a sequence of one bit quantized samples of an input signal having a frequency within a predetermined band of frequencies and to produce a replica of such input signal from such stored one bit samples. A control sig... | 05/12/1981 |
| 4259738 | Multiplexer system providing improved bit count integrity A multiplexer system providing a transmission frame field containing information derived from the cumulative total of stuff bits used over a plurality of frames. The stuff bits which also have assigned positions in the transmission frame are generally use... | 03/31/1981 |
| 4255797 | Sonic attenuation system A beam of sound, of sufficient amplitude for inducing a finite amplitude effect in water, is directed into a field of sound for interaction therewith to produce intermodulation products. Energy is removed from the sound field in the formation of the inter... | 03/10/1981 |
| 4254416 | Variable size character generator A system for displaying, performing positioning, sizing, and performing supportive composition functions for newspaper advertising layout in which characters and symbols are displayed with a height and width closely approximating the height and width of t... | 03/03/1981 |
| 4253005 | Microwave suppression apparatus A microwave suppression apparatus having two lengthwise tunnels and a plurality of septums that sequentially move through both tunnels in a continuous loop. The septums form microwave seals with inner wall portions of the tunnels to prevent the leakage of... | 02/24/1981 |
| 4251755 | CRT Digital brightness control A digitally controlled CRT display system providing display intensity levels having equal ratios of luminances for consecutive steps over a plurality of brightness control settings. The digital video is added to a digital brightness code and the sum is co... | 02/17/1981 |
| 4247900 | Signal combiner with permuted addressing A system for forming a beam of radiant energy which is incident upon or radiated from an array of radiating elements such as sonar transducers. As a wavefront progresses across the array, samples of signals received by individual ones of the transducers a... | 01/27/1981 |
| 4242683 | Signal processor A signal processor having a plurality of charge transfer devices adapted for coupling to an input signal source. Each one of such devices produces a sample of the input signal in response to a sampling signal. An input shift register having a plurality of... | 12/30/1980 |
| 4240397 | Fuel saver oven A gas-fueled oven having energy saving capabilities provided by a thermostatically controlled gas supply valve which supplies fuel to the gas burner at cycled intervals, and a flue restricter which is operatively connected with the thermostat to move into... | 12/23/1980 |
| 4236503 | Grate with adjustable vents A gas-fueled range having top burners and individual valves for controlling flow of fuel to the burners, each burner being covered by an inverted cup-shaped grate for supporting a utensil to be heated, the grate having vents for permitting exhaust of comb... | 12/02/1980 |
| 4231102 | Cordic FFT processor An apparatus for performing a Fourier transform using Cordic techniques. Digital words are pipelined through serial add/subtract stages to provide vector rotations without trignometric lookup tables or multiply operations. The throughput of an FFT butterf... | 10/28/1980 |
| 4227063 | Microwave apparatus seal A microwave heating enclosure having apertures for providing continuous access to the processing region with means for substantially preventing microwave energy leakage from said apertures. Said means for substantially preventing leakage comprises an elon... | 10/07/1980 |
