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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 6371861 | Bumper pocket billiard table The Bumper Pocket Billiard Table in a preferred embodiment of the invention has a circular playing surface bounded by a circular cushion-and-rail assembly with a plurality of circular pocket openings positioned in the perimeter portion of the playing surf... | 04/16/2002 |
| 5867121 | Radar scan converter system The Radar Scan Converter System (1) receives range and azimuth data generated by a conventional radar as presented in a polar coordinate system, (2) stores this data in associated cell locations in a range/azimuth polar video map, and (3) displays this po... | 02/02/1999 |
| 5452137 | Extenders for reflective optical path segments In an optical correlator system having reflective and transmissive optical components positioned along a folded and segmented optical axis or path, one or more optical path extenders are provided for selected optical path segments that require operative p... | 09/19/1995 |
| 5432889 | Vector neural networks A vector neural network (VNN) of interconnected neurons is provided in transition mappings of potential targets wherein the threshold (energy) of a single frame does not provide adequate information (energy) to declare a target position. The VNN enhances ... | 07/11/1995 |
| 5398046 | Faceplate for an interactive display terminal A faceplate assembly has an electrically conductive grid, which is electrically connected to a suitable ground potential, positioned on or above a display screen of an interactive display terminal (IDT) where the grid has a plurality of optical pipes with... | 03/14/1995 |
| 5311359 | Reflective optical correlator with a folded asymmetrical optical axis An optical correlator system having a plurality of reflective optical components, both active and passive, positioned (1) between a source of electromagnetic radiation, such as a visible beam of coherent light, and an output detector array, and (2) around... | 05/10/1994 |
| 5255119 | Reflective magneto-optic device with an embedded conductor channel A reflective mode, magneto-optic spatial light modulator (MOSLM) device has planar electrical conductors which function both as optical mirror surfaces and as the address conductors for random access, selective switching of an associated individual pixel ... | 10/19/1993 |
| 5241412 | Magneto-optic device with reflective conductor A reflective mode, magneto-optic spatial light modulator (MOSLM) device has one or more pixel elements formed from a selected magneto-optic material with a respective pair of coincident current select electrical conductors associated with each pixel where... | 08/31/1993 |
| 5210798 | Vector neural network for low signal-to-noise ratio detection of a target A vector neural network (VNN) of interconnected neurons is provided in transition mappings of potential targets wherein the threshold (energy) of a single frame does not provide adequate information (energy) to declare a target position. The VNN enhances ... | 05/11/1993 |
| 5148496 | Optical correlator with symmetric reflective optics A discoid optical correlator system having a plurality of reflective optical components, a source of electromagnetic radiation, such as visible light, and an output detector which are positioned around the rim region of a solid disk body to develop a symm... | 09/15/1992 |
| 4307322 | Coupled cavity traveling wave tube having improved loss stabilization A coupled cavity traveling wave tube is disclosed which includes a plurality of pole piece members and hollow spacer members which are alternately arrayed to define a plurality of cavities. The pole piece members each has a central aperture and a coupling... | 12/22/1981 |
| 4161010 | Commutation sensor circuit for a DC-to-DC silicon controlled rectifier (SCR) chopper circuit A commutation sensor circuit for a DC-to-DC silicon controlled rectifier (SCR) chopper circuit to protect against commutation failure by determining the commutation capability of the chopper. This determination is made by testing two conditions, first, th... | 07/10/1979 |
| 4160300 | Hammer for forming an undercut fastener driving slot An improved hammer used in the first step of a two-step method for forming an undercut fastener driving slot in the head of a fastener, such as a screw or bolt, that results in an arcuate, recessed high-torque driving slot with undercut slot sidewalls whe... | 07/10/1979 |
| 4047049 | Drive circuit with constant current output A constant current drive circuit that can be driven directly from the output of a shift register which can find use, for example, as a constant current source for a light emitting diode (LED) to ensure uniform birghtness throughout a display surface that ... | 09/06/1977 |
| 4045059 | Multiple conduit joint, constant interface area swivel A conduit joint is shown and described having ingress and egress ports respectively on a first and second conduits. The ports open to a substantially matching area of relatively movable, pneumatic joinder, and have tapered chambers leading therefrom. A me... | 08/30/1977 |
| 4045683 | Drive circuit with constant current A constant current drive circuit that can be driven directly from the output of a shift register which can find use, for example, in maintaining a constant current through a controlled device such as one or more light emitting diodes (LEDs) to ensure unif... | 08/30/1977 |
| 4037281 | Fastener manufacturing method A method of manufacturing a threaded fastener of the self-tapping type where the fastener thread is impregnated with a harder substance than the metal from which the fastener is made by utilizing a thread-rolling machine with an impregnating electrode. A ... | 07/26/1977 |
| 4024368 | Switch assembly having selective actuation sensitivity A switch assembly having a lighted display module for programmable character display where the module is an active part during switch actuation. The module has a force actuating line and is displaced by a predetermined portion of an applied switch actuati... | 05/17/1977 |
| 4022993 | Switch assembly having electrically illuminated character display devices between transparent actuators and switch arrays A switch assembly having a lighted display module for programmable character display where the module is an active part during switch actuation since the module is displaced by and transmits an applied switch actuating force. The switch assembly consists ... | 05/10/1977 |
| 3996834 | Fastening element Disclosed herein is a fastening element which is susceptible of forming a fastener assembly by engagement with a self-tapping screw. An oblique rib is formed within a bore within a blank, or other structural element, close to the end of the bore. The rib ... | 12/14/1976 |
| 3987393 | Line voltage monitor A line voltage monitor for monitoring the voltage applied to electrical equipment and for providing an indication or protective disablement of the equipment in the event excessive variations occur in the line voltage. The line voltage monitor includes a s... | 10/19/1976 |
| 3981571 | Spooling arrangements for endless band material An arrangement for spooling endless band material, particularly for the repeated projection of the full length of cinematograph film required for a complete programme formed as an endless loop, having two double spools each able to carry two film spirals.... | 09/21/1976 |
| 3975788 | Method of forming a threaded female fastener The invention described herein relates to a method of making a threaded nut fastener which joins with a threaded male or screw fastener wherein the threads of the nut are partially formed so as to provide for up to 80% thread-to-thread engagement of the s... | 08/24/1976 |
| 3972084 | Fastener manufacturing method A method of manufacturing a threaded fastener of the self-tapping type is described, where the fastener has the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substan... | 08/03/1976 |
| 3962614 | Method for controlling the output condition of a self excited alternating current induction motor A method for controlling the output torque condition of an induction motor includes the steps of generating a slip frequency in the motor proportional to the desired output torque condition while simultaneously establishing the magnitude and phase displac... | 06/08/1976 |
