Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6295026 | Enhanced direct radiating array An apparatus (800) and method (1000) for forming a shapeable and directable composite beam (305) from a plurality of pixel beams (302). The apparatus (800) includes a front-end unit (810) which communicates element signals through antenna array elements (... | 09/25/2001 |
| 6266996 | Simple and inexpensive method and device for measuring concentration and rate of change of a crystal etchant gas, such as HF or DF gas A method and device for determining concentration and rate of change of concentration of a gas having ability to act as crystal etchant, such as hydrofluoric acid (HF) or deuterium fluoric acid (DF) gas. A crystal 22 is placed in a chamber and subjected t... | 07/31/2001 |
| 6265704 | Tracking means for distant ballistic missile targets A laser tracking system steers a beam of laser energy which is dithered in two directions to scan the surface of a moving object. A laser energy detector detects laser energy reflected from the target. Reflected energy is filtered to distinguish dither fr... | 07/24/2001 |
| 6261872 | Method of producing an advanced RF electronic package An advanced electronics package for integrating electronic components of an electronic circuit, such as RF circuits. An important aspect of the invention relates to the simplicity in forming and integrating the electronic components in the package relativ... | 07/17/2001 |
| 6252725 | Semiconductor micro epi-optical components A method for fabricating a monolithic micro-optical component. The construction of the micro-optical components is accomplished by using standard semiconductor fabrication techniques. The method comprises the steps of depositing an etch stop layer (44) on... | 06/26/2001 |
| 6250583 | Shared aperture dichroic tracker with background subtraction An imaging self-referencing target tracker (10) for a laser weapon (12). The weapon generates a first beam of radiation (14) that engages a target (16) to form a beam hit spot (20) thereon. In a first embodiment, a target illuminator (22) (variant 1) illu... | 06/26/2001 |
| 6252334 | Digital control of smart structures Modular control patches including assemblies of sensors and actuators are provided to impart or control vibration of foundation members such as struts in aerospace apparatus. Local digital electronic control means is associated with each control patch ass... | 06/26/2001 |
| 6249642 | Extended play radio vision cassette recorder system and method of operating same An extended play radio video cassette recorder (EPRVCR) capable of receiving and recording audio and video signals transmitted over a radio frequency channel is provided. The EPRVCR includes a videocassette recorder (VCR) and a tuner capable of receiving ... | 06/19/2001 |
| 6242820 | Apparatus for providing a digital representation of the weight of an object Apparatus for sensing the weight of an object and providing a digital representation of a weight range within which the sensed weight falls, and apparatus for controlling the deployment of a vehicular air bag in accordance with the weight of a passenger s... | 06/05/2001 |
| 6242984 | Monolithic 3D radial power combiner and splitter An SSPA module in accordance with the present invention comprises a signal input (102), and a radial splitter (100) connected to the signal input (102) comprising a plurality of radially extending splitter waveguides 104, 106, 108, 110, 112, 114, 116, 118... | 06/05/2001 |
| 6239422 | Variable electrode traveling wave metal-semiconductor-metal waveguide photodetector A metal-semiconductor-metal photodetector (18) is provided including an optical waveguide (22) disposed on a substrate (28) and an array of metal-semiconductor-metal photodiodes (20) coupled to the optical waveguide (22). An absorber (30) is disposed betw... | 05/29/2001 |
| 6234688 | Packaged integrated, actively aligned with sub-micron accuracy single mode fiber optic connector bulkhead receptacle A method of aligning a photonic device (12) to an optical fiber (20) with sub-micron accuracy. The photonic device packaging assembly (10) includes a housing (16) defining a cavity (14) therein, where the photonic device (12) is mounted within the cavity ... | 05/22/2001 |
| 6234427 | Solar array regulation and spacecraft pointing using flywheel energy storage with programmable voltage control A satellite power regulation and pointing system is disclosed that comprises a power bus (104) and first and second flywheels (114-116) capable of storing rotational energy. Each flywheel (114-118) comprises a flywheel motor/generator (202) for increasing... | 05/22/2001 |
| 6234426 | Modular spacecraft construction requiring no tools for assembly and disassembly A modular spacecraft construction having a simple spacecraft core structure (10) of cylindrical shape, spacecraft equipment modules (12) in the form of generally flat panels that are attached in a radial configuration about the core structure, and electro... | 05/22/2001 |
| 6236687 | Decision directed phase locked loop (DD-PLL) for use with short block codes in digital communication systems An improved digital decision directed phase locked loop (DD-PLL) for use with short block codes using phase shifting keying (PSK) modulation. The improvement involves a conventional digital phase lock loop which is modified to base its loop corrections on... | 05/22/2001 |
| 6229939 | High power fiber ribbon laser and amplifier A single-mode fiber laser (66) that provides increased power. The fiber laser (66) includes a fiber ribbon (30) having a plurality of parallel waveguides (10). Each waveguide (10) includes a rectangular shaped core (12) that has a relatively thin dimensio... | 05/08/2001 |
| 6228197 | Assembly method allowing easy re-attachment of large area electronic components to a substrate A method is provided for attaching electronic components (12) onto a substrate (10) which allows quick, easy and inexpensive subsequent removal and re-attaching of the electronic component (12) to obtain an undamaged printed wiring board package. The meth... | 05/08/2001 |
| 6229332 | Superconductive logic gate and random access memory The present invention is a superconductive logic gate assembly (50, 100), a superconductive NOR gate assembly (10), and a superconductive random access memory (150). A superconductive logic gate assembly in accordance with the invention includes a plurali... | 05/08/2001 |
| 6226121 | Optical telescope system with discontinuous pupil corrector and segmented primary mirror with spherical segments A large, low cost and high quality optical telescope system (1) includes a segmented primary mirror (2) having a plurality of spherical mirror segments (3) arranged in a non-spherical shape (4), a parabolic shape in the disclosed embodiment, so that the r... | 05/01/2001 |
| 6225696 | Advanced RF electronics package An advanced electronics package for integrating electronic components of an electronic circuit, such as RF circuits. An important aspect of the invention relates to the simplicity in forming and integrating the electronic components in the package relativ... | 05/01/2001 |
| 6225936 | Direct digital downconverter and method for converting an analog signal to a digital signal A control scheme for operating an oscillator/counter A/D converter so that it simultaneously provides frequency downconversion, band pass filtering and analog-to-digital conversion of an analog signal, where the analog signal includes a carrier wave modul... | 05/01/2001 |
| 6222828 | Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications A communications waveform format is provided for a satellite-based telecommunications system. The waveform format includes forward and return link waveforms between the satellite, earth stations and terminals. The forward and return links use orthogonal d... | 04/24/2001 |
| 6222499 | Solderless, compliant multifunction RF feed for CLAS antenna systems A compliant RF feed system (10) that provides impedance matching for VHF/AM, VHF/FM, UHF and L-band frequencies. The feed system (70) includes a feed post (14) electrically connected to an antenna element (18) at one end and a matching circuit package (22... | 04/24/2001 |
| 6219524 | Statistical communication link A communications system (34) that monitors a state of a plurality of radios (10). In one embodiment, the communications system (34) automatically and continuously monitors the number of radios (10) tuned to each of a plurality of available radio stations.... | 04/17/2001 |
| 6219254 | Chip-to-board connection assembly and method therefor The chip-to-board (or chip-to-MCM) connection assembly and method therefor features a semiconductor chip (31) having a front surface (31f) on which external terminal pads are provided; a board or MCM (32) having a surface (e.g., a recessed surface) at a f... | 04/17/2001 |
| 6218911 | Planar airbridge RF terminal MEMS switch An RF switch and a process for fabricating an RF switch which includes multiple throws and can be fabricated utilizing only a single layer of metallization. The switch in accordance with the present invention includes an airbridge suspended beam disposed ... | 04/17/2001 |
| 6216983 | Ephemeris/attitude reference determination using communications links A system (300) for determining the ephemeris and attitude for a spacecraft includes ephemeris and attitude determining subsystems (700, 800) that obtain ephemeris data (708, 806) for one or more reference spacecraft crosslinked to the spacecraft. Crosslin... | 04/17/2001 |
| 6216941 | Method for forming high frequency connections to high temperature superconductor circuits and other fragile materials A method for forming high frequency connections between a fragile chip and a substrate is described, wherein metal is selectively deposited on a surface of a chip and a surface of a substrate, and corresponding patterns of electrically conductive bumps ar... | 04/17/2001 |
| 6216445 | Micro pulsed plasma thruster and method of operating same A pulse plasma thruster (50) utilizes a vapor producing solid (54) and a micro-sized heater (52) to produce a high pressure vapor that is directed into an ignition chamber (58) and to a thrust discharge chamber (70). The thrust discharge chamber (70) comp... | 04/17/2001 |
| 6219360 | High average power solid-state laser system with phase front control A scalable high power laser system includes a plurality of parallel connected modular power amplifier arms, coupled to a common master oscillator to provide a high average power laser system with a scalable output power level, particularly suitable for la... | 04/17/2001 |
| 6215983 | Method and apparatus for complex phase equalization for use in a communication system Method and apparatus for complex phase equalization in a communication system. The method includes receiving and downconverting a two-dimensional communication signal to generate in-phase (I) and quadrature (Q) components that have been phase-rotated by a... | 04/10/2001 |
| 6213430 | Vehicle launch system having an acoustic insulator A vehicle launch system having an acoustic insulator, wherein the acoustic insulator is an inflatable assembly disposed between a shroud and a spacecraft vehicle and containing gaseous material for dampening the acoustic noise effect in a spacecraft vehic... | 04/10/2001 |
| 6215330 | Differential diode transistor logic (DDTL) circuit enhancements A relatively low voltage, high speed, differential diode transistor logic DDTL) family of circuits for performing various Boolean logic functions, such as AND, OR, etc. as well as non-Boolean functions, such as buffering and storage. The logic family may ... | 04/10/2001 |
| 6212614 | Legacy MIL-STD-1750A software emulator address translation using power PC memory management hardware A system and method for implementing the paging and protection attributes, such as block protection and access lock and key functions promulgated in MIL-STD-1750A. The present invention takes advantage of the PowerPC microprocessor architecture to impleme... | 04/03/2001 |
| 6211809 | Surface-based passive millimeter-wave landing aid A passive millimeter-wave imaging system (10) that includes a millimeter-wave camera (12) positioned at the end of an aircraft landing strip (14) to provide an image (20) of the aircraft (16) approaching the landing strip (14) along a landing glidepath (1... | 04/03/2001 |
| 6211641 | Capacitive resolver The present invention provides a capacitive resolver (100). The capacitive resolver (100) includes a charge plate (102), a sensing plate (106), and an interrupter plate (400) positioned between the charge plate (102) and the sensing plate (106). The front... | 04/03/2001 |
| 6212559 | Automated configuration of internet-like computer networks A system and corresponding method of its operation, for configuring a communication network of multiple interconnected computers. The system includes a graphical user interface (36) that facilitates the functions of task organization development (38), pla... | 04/03/2001 |
| 6208773 | Addressable, semiconductor adaptable Bragg gratings (ASABG) A Bragg grating device (10) is provided including a semiconductive optical waveguide (12) with a Bragg grating structure (14) formed along its length. A first plurality of electrodes (16) are disposed on a first surface (18) of the optical waveguide (12) ... | 03/27/2001 |
| 6208677 | Diode array package with homogeneous output A diode array (32) which includes a diode bar (22) having a plurality of laser diodes (42) within an active region (40) so as to emit light parallel to an optical axis (26), generally parallel to the laser diodes (42). The diode bars (22) are sandwiched b... | 03/27/2001 |
| 6208310 | Multimode choked antenna feed horn An antenna feed horn (10) for a satellite antenna array that includes multiple chokes (34, 36, 40, 42, 44) that provide effective control of the horn aperture mode content to generate radiation patterns which substantially have equal E-plane and H-plane b... | 03/27/2001 |
