Bizarre Patents
Nicotine Containing Dental Floss
Keep away cavities and cancer at the same time.
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 |
| 4870575 | System integrated fault-tree analysis methods (SIFTAN) The subject invention employs a system integrated fault-tree analysis (SIFTAN) which has the unique ability to detect all latent hardware and software design defects that could cause unanticipated critical failure of a complex software controlled electron... | 09/26/1989 |
| 4866447 | Combined radar and data link A first plurality of spaced radar ground systems and a second plurality of radar ground systems positioned in between adjacent pairs of the first systems. The first systems, when employed in an early warning radar chain, preferably have antennas which are... | 09/12/1989 |
| 4866504 | Direct interconnection for use between a semiconductor and a pin connector or the like A direct device-to-connector interconnection includes a plurality of conductive strips affixed to a support member, each strip being cooperatively sized and aligned to establish a direct fanned out connection between a bonding pad and an external connecto... | 09/12/1989 |
| 4864315 | Phased array antenna testing arrangement An arrangement for testing the performance of an electronic system utilizing a phased array antenna as its principal radiator into a predetermined sector of space includes, as one of its main components, an enclosure which bounds a miniature anechoic cham... | 09/05/1989 |
| 4856030 | Apparatus and methods of locking a receiving modem to a transmitting modem employing a burst signal A receiving modem is locked to a transmitting modem by employing a burst data and clock signal having an effective data rate compatible with the data rate of a receiving data set. The receive modem processes a transmitted analog signal as sent by the tran... | 08/08/1989 |
| 4853098 | Method of making image intensifier tube An image intensifier tube and a method of making same are disclosed wherein veiling glare caused by the amplification of off axis light is reduced. Included is a non-reflective, near infrared light absorbing first layer formed on the face plate of the tub... | 08/01/1989 |
| 4853020 | Method of making a channel type electron multiplier A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core mater... | 08/01/1989 |
| 4851850 | Priority mapper for initiation of radar tracking of projectiles Electronic priority map storage and control for prioritizing radar detections for fire control or monitoring purposes relative to batteries of mortars or artillery or other projectile sources. Use of a priority map to increase probability of location of a... | 07/25/1989 |
| 4849376 | Self-aligned refractory gate process with self-limiting undercut of an implant mask A process for manufacturing GaAs FET's having refractory metal gates provides for reducing the size of the gate relative to a mask by an etch sequence which results in precisely controlled and repeatable self-limited undercutting of the mask. A reactive i... | 07/18/1989 |
| 4847212 | Self-aligned gate FET process using undercut etch mask The provision of an intermediately doped transition region between respective n+ implanted source and drain regions in a GaAs FET and the lightly doped channel region under the gate permits device optimizaiton for low source and drain resistance in EFET's... | 07/11/1989 |
| 4843229 | High light level cutoff apparatus for use with night vision devices There is disclosed a high light level cutoff apparatus for use with night vision devices. The apparatus employs a digital method of timing implemented by a divider counter responsive to a crystal controlled input frequency which essentially controls a lat... | 06/27/1989 |
| 4843291 | Digital to synchro converter A digital-to-synchro converter is provided where a binary input code specifies a desired shaft angle and where an resolver type position transducer is employed with additional circuitry to generate a shaft position error signal indicative of the angular d... | 06/27/1989 |
| 4837830 | Multiple parameter speaker recognition system and methods An apparatus operates to identify the speech signal of an unknown speaker as one of a finite number of speakers. Each speaker is modeled and recognized with any example of their speech. The input to the system is analog speech and the output is a list of ... | 06/06/1989 |
| 4837721 | Digital divider with integer and fractional division capability A digital divider with both integral and fractional division capabilities is provided by utilization of a counter and one decoder to trigger phase reversal and a second decoder to trigger short-cycling of the counter. The first decoder provides phase reve... | 06/06/1989 |
| 4833512 | Heterojunction photo-detector with transparent gate A photo-detector in the form of an optical field effect transistor comprig a semi-insulating InP substrate (1), a p+InP gate region ( 2) an n- InGaAs channel region (3) and source and drain contacts (5,6). Light incident on the bott... | 05/23/1989 |
| 4832761 | Process for manufacturing gallium arsenide monolithic microwave integrated circuits using nonphotosensitive acid resist for handling A process for manufacturing gallium arsenide microwave circuits makes use of a nonphotosensitive acid resist as an adhesive for holding the "front side" of a gallium arsenide wafer onto a substrate while operations such as etching "via holes" into the waf... | 05/23/1989 |
| 4827267 | High availability solid state modulator for microwave cross-field amplifiers A solid state radar transmitter pulse modulator system capable of generating high power operating pulses having pulse width and pulse repetition rate agility and being programmable for output pulse current over a substantial range of peak current values t... | 05/02/1989 |
| 4823020 | High voltage pulse top clipper with precise regulation of clipping level A high voltage pulse clipper for stabilizing the amplitude of successive pulses applied, for example, as modulator pulses to a microwave transmitter. A source of such pulses has its output connected across a capacitor through a series diode whereby the ca... | 04/18/1989 |
| 4822994 | Small arms sight for use during daylight and nighttime conditions There is disclosed a small arms sight assembly which enables a firearm such as a revolver or rifle to be employed for both nighttime and daytime use. The gun sight assembly includes a typical telescopic sight assembly of a conventional design which sight ... | 04/18/1989 |
| 4822141 | Liquid crystal beam splitter A liquid crystal beam splitter includes a magnetic coil adapted to controllably orient, or tilt, the molecules of a layer of liquid crystal material and thereby detune the internal reflections of a polarized light beam component passing therethrough.... | 04/18/1989 |
| 4816967 | Low impedance interconnect method and structure for high frequency IC such as GaAs A method and structure are disclosed for mounting and connecting an electic device such as an integrated circuit to a circuit board. The board has a plurality of embedded shielded conductors for interconnecting the integrated circuit to other devices on ... | 03/28/1989 |
| 4814836 | FET photoconductor with a heterojunction in the channel A photoconductor comprising an optically sensitive FET in which an abrupt heterojunction (18) is inserted in the channel (11) at a certain distance from the gate contact (16). This provides a potential barrier (17, FIG. 4) in the valence band that accumul... | 03/21/1989 |
| 4814780 | Variable directional coupler The variable directional coupler of the subject invention employs 3, 4 or n branches in TEM transmission media, such as coax, stripline and microstrip. Precise control of the coupling is acheived by a variable susceptance connected near the mid-point of t... | 03/21/1989 |
| 4814779 | Radar system with auxiliary scanning for more dwell time on target A radar system with auxiliary scanning provision for providing more dwell time on target, the system having a main frequency scan antenna with electronic or mechanical arrangements for auxiliary scanning. In the electronic embodiment, a space fed phased-a... | 03/21/1989 |
| 4813769 | Liquid crystal wave division device A liquid crystal wave division device includes first and second polarization changing cells, the polarization changing cells utilize homogeneously aligned nematic liquid crystal material to effect the change of polarization of a preselected frequency port... | 03/21/1989 |
| 4811425 | Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers Apparatus for reducing the effects of mixer leakage in a zero IF transmission system includes first and second mixers having relatively equal leakage amounts from an oscillator port to an input port, with the input port of said first mixer adapted to rece... | 03/07/1989 |
| 4811399 | Apparatus and method for automatic speech recognition An apparatus for automatic speech recognition includes a plurality of processors, including template processors in which there are stored templates representative of both speech and non-speech sounds. Incoming sounds are continuously converted into digita... | 03/07/1989 |
| 4804635 | Method of manufacture of galluim arsenide field effect transistors A self-aligned gate structure for a compound semiconductor MESFET is formed rom a lower silicon layer and an upper metal, e.g. nickel, region. The nickel region forms an etch mask for the silicon and subsequently an implantation mask for the drain and sour... | 02/14/1989 |
| 4804287 | Apparatus for inserting, securing and extracting receptacles, such as equipment cases A device is disclosed by which a portable receptacle can be inserted onto, secured to and extracted from a stationary support. The device utilizes a pair of cooperating securing members, one of which is attached to the support and the other of which is at... | 02/14/1989 |
| 4803490 | Horizon stabilized antenna beam for shipboard radar A shipboard search radar in which an antenna beam is stepped up and down in elevation to keep the beam pointed approximately toward the horizon even though the ship may be rolling and/or pitching.... | 02/07/1989 |
| 4801202 | Method and apparatus for radiometer star sensing A method and apparatus for determining the orientation of the optical axis of radiometer instruments mounted on a satellite involves a star sensing technique. The technique makes use of a servo system to orient the scan mirror of the radiometer into the p... | 01/31/1989 |
| 4795361 | Clamping apparatus for coupling waveguides to one another There is disclosed a clamping device which comprises a U-shaped spring secured to a spring retainer in a pivotable manner. The spring retainer is a sub-assembly which consists of two plates forming a slot when sandwiched together to accommodate the spring... | 01/03/1989 |
| 4792212 | Liquid crystal switching device A liquid crystal switching device includes first and second polarization reorienting cells disposed such that a polarized component of an incident light beam is incident normal to the cell.... | 12/20/1988 |
| 4792941 | Data subsystem traffic control apparatus and method An apparatus for controlling data traffic throughout a communication network includes a plurality of network interface devices in each subsystem. The interface devices are substantially identical throughout the network and each autonomously controls all d... | 12/20/1988 |
| 4790633 | Liquid crystal switching apparatus A liquid crystal switching apparatus includes a plurality of juxtaposed liquid crystal switching devices, each such device being capable of selectively reorienting the polarization of a polarized light beam component incident thereupon.... | 12/13/1988 |
| 4788509 | Phase shifter A multifunction monolithic microwave integrated circuit composed of a pluity of dual gate FET amplifier sections connected between a pair of transmission lines which are adapted to receive one or two input signals. The circuit can be configured, by selec... | 11/29/1988 |
| 4788548 | Phase measurement ranging A passive radar ranging system having an antenna system for receiving radiated electromagnetic energy emanating from an emitter source, plus a translation resolution system and a digital computation system for making phase measurements of the received ele... | 11/29/1988 |
| 4784470 | Optical switching device An optical switching device includes first and second polarization changing cells, the polarization changing cells utilize twisted nematic liquid crystal material to effect the change of polarization. The resultant device exhibits reduced cross talk betwe... | 11/15/1988 |
| 4783845 | Digital tone squelch detector A digital tone squelch detect circuit functions to give an enabling signal for audio transmission in an FM radio network. The circuit comprises an analog to digital converter which outputs a binary coded signal representative of the voltage level of a rec... | 11/08/1988 |
| 4782299 | Methods of arc and corona monitoring for high voltage generators There is disclosed a method for determining the location of an arc or corona as occurring in a high voltage power supply. The technique utilizes sheets of sensitive photographic film which are placed between printed circuit boards of the supply or between... | 11/01/1988 |
