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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 |
| 4868783 | Dynamic port reconfiguration A system for interconnecting an intelligent controller to a plurality of terminal devices includes a software module, a microprocessor and a device adapter having a plurality of output ports. The system operates under the control of said software module. ... | 09/19/1989 |
| 4833462 | Raster-scanned cathode ray tube display with cross-hair cursor A raster-scanned interlaced cathode ray tube display is refreshed from a bit buffer (1). Cursor control logic (17) compares the refresh address (3, 4) with a desired cursor address and generates cursor defining bit patterns in synchronism with the bit pat... | 05/23/1989 |
| 4821209 | Data transformation and clipping in a graphics display system A display processor in a raster graphics display system includes a transformation, clipping and mapping feature which controls the transformation, clipping and mapping of graphics data. A control byte contains 5 bits identified as: M--Window to viewport m... | 04/11/1989 |
| 4789954 | Method for generating quadratic curve signal Assuming that a given equation representing a quadratic curve is: the method for generating quadratic curve signals repeatedly selects a point close to F (x, y)=0 in only one of either the region of F (x,y)ࣙ0 or the region of F (x,y) | 12/06/1988 |
| 4785627 | Drive device A drive device of the type utilizing the property of shape memory alloys comprising a first wheel (12) and a second wheel (16) drivingly coupled together by means of a wire loop (20) of a shape memory alloy and a generator and/or a fan (7) coupled as an i... | 11/22/1988 |
| 4766364 | Parallel power systems A d.c. power supply system comprises a plurality of voltage regulating power supplies connected in a master slave configuration, the number of regulators being one greater than required to provide load current requirements. The master regulator generates ... | 08/23/1988 |
| 4754390 | Conductively cooled switching regulator A switching regulator designed for high power high current transfer is adapted for reducing leakage inductance and heat dissipation. The switching regulator comprises a transformer/receiver assembly utilizing a planar winding configuration in the transfor... | 06/28/1988 |
| 4747783 | Resistive pin for printed circuit card connector An improved connector assembly includes a resistor coated guide pin to facilitate coupling or decoupling a circuit card to a circuit board. A first embodiment of the pin configuration comprises a single taper pin for eliminating current surges during inse... | 05/31/1988 |
| 4745575 | Area filling hardware for a color graphics frame buffer A graphics display apparatus includes a raster-scanned CRT refreshed from a bit-for-pel refresh buffer loaded with bit patterns by a microprocessor corresponding to a desired image. To display shaded areas, additional control logic draws an outline of the... | 05/17/1988 |
| 4725829 | Automatic highlighting in a raster graphics display system In an interactive graphics display system in which pels in a frame buffer are mapped to the display screen of a raster display device, a method of automatically highlighting and de-highlighting graphic segments as a cursor is moved across the display scre... | 02/16/1988 |
| 4716533 | Image translation system A dot pattern source image stored in a pattern memory is moved to a specified location in the pattern memory in an angle of n×90° (n=0, 1, 2, or 3) with respect to the source image. First, area definition is made for a rectangular source area including ... | 12/29/1987 |
| 4698808 | Method for detecting intermittent error in volatile memory Primary and secondary data save areas are established in a volatile memory (CMOS) which is backed up with a battery. The same predetermined data are stored in the primary and secondary data areas together with check sum. At a power on time, the data of th... | 10/06/1987 |
| 4689617 | Concentric via plasma panel A one sided a.c. plasma panel comprises a glass substrate encapsulated within a pair of glass plates dividing the panel into two interconnected chambers. One set of conductor arrays originate within the rear aperture are are conducted through display vias... | 08/25/1987 |
| 4683470 | Video mode plasma panel display An a.c. Plasma Display Panel is operated in a scanning mode using a conventional video data stream such as that applied to a cathode ray tube display terminal. A full line write followed by a selective erase technique is employed for image generation on a... | 07/28/1987 |
| 4644340 | Programmable timing circuit for cathode ray tube A programmable timing circuit for a cathode ray tube includes a register stack (48) in which events to be timed are stored so that they are presented to comparators (45, 46 or 47) in the sequence in which they will occur. Each event is coded in terms of t... | 02/17/1987 |
| 4611203 | Video mode plasma display An A.C. Plasma Display Panel is operated in a video mode using the same signal train as applied to a conventional cathode ray tube terminal. For character generation, a selective erase technique is employed in which all cells in a raster line are discharg... | 09/09/1986 |
| 4594588 | Plasma display margin control In large size high resolution plasma panels, a smaller discharge gap between the electrodes reduces the operating margin of the panel, i.e., the difference between the maximum and minimum sustain voltage (Vs max and Vs min). Rather t... | 06/10/1986 |
| 4591847 | Method and apparatus for gas display panel Low cost apparatus for a gas display panel is operated by a method to provide reliable write, sustain, and erase operations. For sustain operations a first square wave train is applied to all horizontal lines of the gas display panel simultaneously as a s... | 05/27/1986 |
| 4591123 | Adjustable brake assembly A tiltable and/or rotatable support for a display device includes a cam operated locking mechanism operable to positively clamp the support in a selected swivel and/or tilt position and limiting the amount of tilt and swivel to predetermined amounts. The ... | 05/27/1986 |
| 4591120 | Tiltable and/or rotatable support for display device A tiltable and/or rotatable support for a display device which includes a locking mechanism 19, 20, 21, 22, 23, 24 operable to lock the support in a selected tilt position while still permitting swivel adjustment. The support may be provided as a stand-al... | 05/27/1986 |
| 4588471 | Process for etching composite chrome layers Chrome/copper/chrome conductor arrays deposited on glass plates are etched with an aqueous acidic composition which contains an acid and a thiourea compound.... | 05/13/1986 |
| 4580230 | Cathode ray tube controller A cathode-ray tube controller uses a content addressable associative storage array (10) to generate repetitively a sequence of video control signals for a CRT to which it is attached. A binary coded counter (4) incremented by the system clock (CL) of the ... | 04/01/1986 |
| 4571527 | VFET Driving circuits for plasma panel display systems A driving system for a plasma panel display which uses VFETs for output switches controls the transition time of an output waveform to a constant time. Transformerless circuitry for communicating low voltage digital logic signals across a floating boundar... | 02/18/1986 |
| 4565946 | Color cathode ray tube with infrared emitting phosphor in screen In order to permit reliable light pen interaction with a black matrix shadow mask CRT, the conventional black carbon matrix is replaced by an IR phosphor. This provides a component of IR radiation irrespective of the particular color of the visible displa... | 01/21/1986 |
| 4524352 | High frequency pilot In a plasma display panel consisting of gas enclosed between adjacent insulating members having conductors thereon insulated from the gas, a light source in the panel is used to condition all cells to permit selected orthogonal conductors to constitute a ... | 06/18/1985 |
| 4509345 | Laundry heat recovery system A laundry heat recovery system includes a heat exchanger associated with each dryer in the system, the heat exchanger being positioned within the exhaust system of the dryer. A controller responsive to the water temperature of the heat exchangers and the ... | 04/09/1985 |
| 4475060 | Stabilized plasma display device A high resolution gaseous discharge display and/or memory device comprises a panel array of bistable charge storage areas designated gaseous discharge cells or sites, each cell having an associated pair of coordinate orthogonal conductors defining the cel... | 10/02/1984 |
| 4463288 | Cathode ray tube drive circuitry Cathode ray tube drive circuitry in which non-linearity of the line scan is corrected by varying the frequency of the pel clock oscillator in accordance with anticipated variations in scanning speed. Predetermined speed corrections are stored in a digital... | 07/31/1984 |
| 4429303 | Color plasma display device A multicolor gaseous discharge display device utilizes electroluminescent techniques as a plasma environment. A layer of electroluminescent phosphor material is used as the dielectric layer overlying the conductor electrodes in an A.C. plasma device. In o... | 01/31/1984 |
| 4410840 | Color cathode ray tube display apparatus with compensation for errors due to interfering magnetic fields A color cathode ray tube display apparatus is provided with compensation for errors due to interfering magnetic fields in which a deflection yoke causes the electron beams to raster scan across the tube, a convergence assembly on the neck of the cathode r... | 10/18/1983 |
| 4370651 | Advanced plasma panel technology A drive system for a plasma display device includes a background sustain generator which is divided between a discrete analog circuit and an integrated driver chip. The integrated driver chip includes low impedance switch pairs controlled by a pair of com... | 01/25/1983 |
| 4368659 | Piano pedal assembly A piano pedal assembly includes a plurality of pedals attached to a support member. The support member is of unitary construction, and includes a flat surface area having depressions therein adapted to contain the pedals in the assembly. Each pedal contai... | 01/18/1983 |
| 4369396 | Color cathode-ray tube apparatus with shadow mask In shadow mask color cathode-ray tube apparatus, the shadow mask is provided with slits or rows of slots extending from side to side of the mask and a line raster is constrained so that the lines of the raster are colinear with the slits, there being just... | 01/18/1983 |
| 4364129 | Water saving flush system A toilet flush system designed for manual control of the amount of water used for a toilet flush cycle uses a tank ball, flapper valve, or other type valves to control the closing of a reservoir outlet at selected times prior to or upon completion of the ... | 12/21/1982 |
| 4340840 | DC Gas discharge display panel with internal memory A D.C. gaseous discharge display panel operated in a storage mode uses a layer of resistive material over the cathodes of the display. In addition to protecting the electrodes from ion bombardment induced sputtering during discharge, the material provides... | 07/20/1982 |
| 4278909 | Modified conductor array for plasma display panel In plasma display panels requiring interstitial spacer elements within the display area to provide and maintain a uniform discharge gap, the spacers are positioned between lines which constitute the display. The lines adjacent the spacer elements experien... | 07/14/1981 |
| 4242680 | Multiple data line shift gas panel assembly A plasma panel arrangement for storing, displaying and selectively shifting information from one place therein to another includes a panel filled with an illuminable gas, and horizontal and vertical parallel conductor arrays disposed on opposite sides of ... | 12/30/1980 |
| 4235001 | Gas display panel fabrication method A gas panel fabrication method includes forming a first set of dielectrically coated parallel conductors on a glass plate, forming a metal spacer layer over the first conductors, oxidizing those areas of the metal spacer layer which are between the first ... | 11/25/1980 |
| 4207488 | Dielectric overcoat for gas discharge panel A high resolution gaseous discharge display and/or memory device comprises a panel array of bistable charge storage areas designated gaseous discharge cells or sites, each cell having an associated pair of coordinate orthogonal conductors defining the cel... | 06/10/1980 |
| 4200868 | Buffered high frequency plasma display system A plasma discharge display device is operated at a high frequency above the response range of the inherent wall charge storage phenomenon and utilizes a refresh buffer. The vertical drive selection includes a pair of shift registers operated in parallel i... | 04/29/1980 |
