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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6621854 | Spread-spectrum electromagnetic signals An assembly of simultaneously transmitted electrically generated signals is disclosed, which contains a subset of binary spreading-code sequences that are members of a larger set of binary spreading-code sequences available to a particular node of a multi... | 09/16/2003 |
| 6180945 | Dual spiral photoconductive detector A photoconductive detector (3) comprises a single continuous photoconductive strip consisting of two interleaved photoconductive spiral paths (1, 2) separated by much thinner gaps (5, 6). The two spiral paths (1, 2) have the same central point (19). The d... | 01/30/2001 |
| 5991333 | Spread-spectrum transceiver A method and apparatus for electrically generating sets of binary spreading-code sequences for use in a multi-node communication network. Also, a method for assigning disjoint sets of binary spreading-code sequences to different nodes of such a network. E... | 11/23/1999 |
| 5471346 | Casegrain telescope with spherical mirror surfaces To develop a design form for a Cassegrain-type telescope with spherical primary and secondary mirrors, which is well-corrected for chromatic aberration as well as for geometrical aberrations including spherical aberration, coma and astigmatism, the design... | 11/28/1995 |
| 5446581 | Inverted telephoto wide-aperture wide-field infrared lens system Design forms are disclosed for wide-field infrared imaging systems characterized by a large ratio of entrance aperture to focal length, where the limiting aperture stop is located in the converging image space.... | 08/29/1995 |
| 5446591 | Lens mounting for use with liquid lens elements In a lens assembly for a telescope objective that comprises liquid lens elements contained between adjacent glass lens elements, each glass lens element is adhesively bonded to an interior surface of a corresponding cylindrical mounting ring by a sealant ... | 08/29/1995 |
| 5384657 | Laser beam expanders with glass and liquid lens elements Design forms are disclosed for 5× and 10× laser beam expanders whose lens elements consist of glass and liquid optical materials, which provide diffraction-limited performance without refocussing over a wavelength range from 0.4 micron to 0.8 micron.... | 01/24/1995 |
| 5373396 | Laser beam expanders with plastic and liquid lens elements Design forms are disclosed for 5X and 10X laser beam expanders whose lens elements consist only of plastic and liquid optical materials, which provide diffraction-limited performance without refocussing over a wavelength range from 0.4 micron to 0.8 micro... | 12/13/1994 |
| 5364491 | Grid structures Integrally formed grid structures made of composite graphite-epoxy material are disclosed in which graphite fibers extend three-dimensionally in at least three different directions.... | 11/15/1994 |
| 5356692 | Grid structure with sinuous interstices A grid structure with sinuous interstices comprises intersecting grid sections having undulate surfaces. The intersecting grid sections of the grid structure are made of a composite material consisting of fibers (e.g., graphite fibers) embedded in a matri... | 10/18/1994 |
| 5349533 | System and method for collision checking between solid objects and vectors A path analyzer for determining if a specified path is blocked by a given solid obstacle in three dimensional space. A programmable comparator converts path endpoints into first and second map signals, wherein each map signal indicates whether the corresp... | 09/20/1994 |
| 5345337 | Viscous supercooled liquid lens elements having abnormal dispersion Optimized design forms are provided for glass-liquid lens triplets for use as telescope objectives having reduced secondary spectrum. Each lens triplet comprises an abnormal-dispersion liquid lens element contained between two normal-dispersion glass lens... | 09/06/1994 |
| 5342679 | Grid structures Integrally formed grid structures made of composite graphite-epoxy material are disclosed in which graphite fibers extend three-dimensionally in at least three different directions.... | 08/30/1994 |
| 5330599 | Grid structures Integrally formed grid structures made of composite graphite-epoxy material are disclosed in which graphite fibers extend three-dimensionally in at least three different directions.... | 07/19/1994 |
| 5329404 | Laser beam expander: 5X A 5× laser beam expander lens that is well-corrected for chromatic aberration can be used without refocussing over a wavelength range from 0.365 micron to 1.3 micron.... | 07/12/1994 |
| 5307429 | Temperature-independent optical coupler An optical coupler 13 comprises a monolithic block of transparent optical material with a pair of opposite sides configured so that an optical signal can be transmitted between a first device 12 and a second device 14 with internal reflections within the ... | 04/26/1994 |
| 5305150 | Laser beam expander: 10× A 10× laser beam expander lens that is well-corrected for chromatic aberration can be used without refocussing over a wavelength range from 0.365 micron to 1.3 micron.... | 04/19/1994 |
| 5293895 | Liquid management apparatus for spacecraft In a liquid storage tank 10 for use on a spacecraft, a transfer apparatus 15 (comprising gathering vanes 33, an elongate array of fins 32, and a sponge structure formed from panels 31) functions to transfer liquid from the inner surface of the tank 10 to ... | 03/15/1994 |
| 5279323 | Liquid management apparatus for spacecraft In a liquid storage tank 10 for use on a spacecraft, a transfer apparatus 15 (comprising gathering vanes 33, an elongate array of fins 32, and a sponge structure formed from panels 31) functions to transfer liquid from the inner surface of the tank 10 to ... | 01/18/1994 |
| 5267271 | Signal analysis technique for determining a subject of binary sequences most likely to have been transmitted in a multi-node communication network A method and apparatus are disclosed whereby a received signal comprising a binary spreading-code sequence, which belongs to a set of binary spreading-code sequences available to a transmitting node of a multi-node communication network, can be analyzed t... | 11/30/1993 |
| 5263329 | Flow management apparatus for cryogenic liquid In a tank 10 for cryogenic liquid to be used in a low-gravity environment (e.g., on a space vehicle), a liquid transfer apparatus 15 (which comprises an elongate array of fins 32 and a sponge structure formed from panels 31) functions to transfer cryogeni... | 11/23/1993 |
| 5221363 | Solar cell window fitting An array of solar cells for supplying electrical energy to a building (e.g., for operating air-conditioning equipment) is mounted in a window fitting, which comprises a pair of transparent glass panes between which a window blind (e.g., of the venetian bl... | 06/22/1993 |
| 5210646 | Color-corrected optical systems and method of selecting optical materials therefor A method is described for selecting optical materials to use in designing color-corrected optical systems. Various dioptric, catadioptric and anamorphic optical systems are described, which use only two different types of optical materials to obtain preci... | 05/11/1993 |
| 5210770 | Multiple-signal spread-spectrum transceiver A method and apparatus for communication in a spread spectrum network are disclosed. Blocks of bits embodying information are assigned to corresponding subsets of binary spreading code sequences and at least one of the subsets of binary spreading code seq... | 05/11/1993 |
| 5204782 | Color-corrected optical systems A method is described for selecting optical materials to use in designing color-corrected optical systems. Various dioptric, catadioptric and anamorphic optical systems are described, which use only two different types of optical materials to obtain preci... | 04/20/1993 |
| 5200758 | System for controlling the radiation pattern of an antenna An antenna system is provided having a plurality of individual antenna elements located on a foldable platform. The antenna elements are appropriately phased to yield a desired radiation pattern. The platform has a plurality of light-emitting devices moun... | 04/06/1993 |
| 5155750 | Stereoscopic radiographic inspection system An object (10) to be radiographically inspected is irradiated in a sequence of different positions with respect to an X-ray beam emitted by a single source (12). A single X-ray detector in an imaging system (13) produces a series of electronic signals cor... | 10/13/1992 |
| 5155606 | Glint suppression technique Glints (e.g., images of point sources attributable to specular reflections) are suppressed in the focal plane of an optical imaging system by: a) Fourier-transforming an image of the imaging system's object field (including glints), and dividing the resulting ... | 10/13/1992 |
| 5140387 | Semiconductor device in which gate region is precisely aligned with source and drain regions An aligned metal gate is formed on a semiconductor substrate surface between a source region and a drain region of the substrate. Precise alignment of the boundaries of the gate with the boundaries of the source and drain regions is obtained by shadowing ... | 08/18/1992 |
| 5114238 | Infrared catadioptric zoom relay telescope A catadioptric zoom relay telescope whose refractive elements are made from only a single type of optical glass focuses all wavelengths in a broad infrared bandwidth onto a common focal plane with diffraction-limited imagery throughout a changing focal ra... | 05/19/1992 |
| 5100589 | Optical method for altering molecular alignment in selected regions of a non-linear optical polymeric structure A channel waveguide is integrally formed within a structure made of a non-linear optical polymer by focussing a beam of optical radiation into a specified region within the structure where the channel waveguide is to be located. The focussed beam of optic... | 03/31/1992 |
| 5090803 | Optical coordinate transfer assembly An optical coordinate transfer assembly provides angular correlation between spatially separated objects. In a particular embodiment of the invention, roll, pitch and yaw of a second directional device 12 relative to a first directional device 11 can be m... | 02/25/1992 |
| 5089910 | Infrared catadioptric zoom relay telescope with an asperic primary mirror A catadioptric zoom relay telescope with an aspherical primary mirror and only three movable lens elements focuses all wavelengths in a broad infrared bandwidth onto a common focal plane with substantially diffraction-limited imagery throughout a changing... | 02/18/1992 |
| 5068869 | Surface-emitting laser diode A surface-emitting semiconductor laser diode has a vertical multilayer active region and a lateral buried heterojunction. Effective carrier confinement to the active region is achieved, thereby permitting laser action at room temperature under continuous-... | 11/26/1991 |
| 5051146 | Apparatus for fabricating a graded-groove heat pipe A chemical etching technique is described for providing longitudinally extending capillary grooves of variable cross-sectional dimension on the interior surface of a heat pipe.... | 09/24/1991 |
| 5047788 | Figure control system for a flexible antenna The figure of an unfurled antenna comprising a radio-frequency reflective fabric (10) is mapped and controlled by a system comprising a plurality of light-emitting devices (14, 15) mounted at precisely specified locations on ribs (11), which support the f... | 09/10/1991 |
| 5039189 | Optical signal distribution network and method of converting independent optical/electrical signals A network for distributing a set of independent high-frequency electrical signals comprises an optical rail waveguide that is fed with a measured amount of optical power from a single source, and a set of optical railtaps positioned at sequential location... | 08/13/1991 |
| 5033831 | Color-corrected lens triplets with liquid lens elements A family of achromatic lens triplets and an apochromatic lens triplet are described, each of which consists of a fluidal liquid lens element (viz., Cargille 550206 liquid) contained between a Schott BK 7 glass lens element and a Schott F2 glass lens eleme... | 07/23/1991 |
| 5024530 | Multichannel telecentric filtered imager Optical radiation generated by an auroral event is gathered by a fish-eye optical objective (12, 21, 22) and focussed by a telecentric lens (23) to a focal region where a two-passband filter (24) is located. The filter (24) passes two narrow bands of opti... | 06/18/1991 |
| 5020889 | Color-corrected optical systems A method is described for selecting optical materials to use in designing color-corrected optical systems. Various dioptric, catadioptric and anamorphic optical systems are described, which use only two different types of optical materials to obtain preci... | 06/04/1991 |
