Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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 |
| 5414431 | Satellite communication system A satellite communication system in which a satellite receives a signal on a uplink carrier frequency, frequency translates it, and transmits the signal at a downlink carrier frequency. The downlink carrier frequency differs from the uplink carrier freque... | 05/09/1995 |
| 5349606 | Apparatus for multipath DSSS communications Circuit for recovery of a plurality of multipath direct sequence spread spectrum signal components received over a time span, wherein the multipath signal components are components of a signal generated from digital data comprised of data bits at a data b... | 09/20/1994 |
| 5345200 | Coupling network A coupling network for coupling a signal at a frequency from a voltage source to a load. The voltage source has a source resistance. The load has a load resistance and a load reactance. The ratio of the load reactance to the load resistance greater than 1... | 09/06/1994 |
| 5343495 | Method of multipath dsss communications Method of demodulating a signal including a plurality of time-dispersed signal components such as resulting from receiving in a multipath environment. A plurality of correlators are provided. The period of expected time uncertainty is scanned to identify ... | 08/30/1994 |
| 5317604 | Isochronous interface method Method of transferring isochronous data from a source over a clocked channel to a sink. The data is compressed by a compression ratio responsive to a depth of a first variable stack. The compressed data is stored in the first stack and clocked by the chan... | 05/31/1994 |
| 5317603 | Isochronous interface apparatus Isochronous interface apparatus for transferring data from a source over a clocked channel to a destination. A channel input interface is interposed between the source and the channel. The channel input interface includes a data compressor adapted to comp... | 05/31/1994 |
| 5315616 | Correlator for DSSS communications A correlator for processing a direct sequence spread spectrum communication system signal, wherein digital data comprised of data bits at a data bit rate is modulated by a first pseudo-noise code comprised of a sequence of chips having a pseudo-noise chip... | 05/24/1994 |
| 5315615 | DSSS communications correlation Method of processing a direct sequence spread spectrum communication system signal wherein digital data comprised of data bits is modulated by a first pseudo-noise code comprised of a sequence of chips, the pseudo-noise chip rate greater than said date bi... | 05/24/1994 |
| 5313491 | Acquisition method for DSSS communications Method for indicating the end of an acquisition procedure between a transmitter and receiver in a direct sequence spread spectrum communications system. At a transmitter, a first acquisition code having a first acquisition code period and comprised of dig... | 05/17/1994 |
| 5313490 | Acquisition apparatus for DSSS communications Apparatus for indicating the end of an acquisition procedure between a transmitter and receiver in a direct sequence spread spectrum communications system. A transmitter generates a first acquisition code having a first acquisition code period and compris... | 05/17/1994 |
| 5305286 | Bistatic/monostatic sonar fence A sonar system has at least two separated bottom-mounted acoustic modules, each module including a projector for generating horizontal sound beam, a vertical line receive array for monostatic and bistatic detection, and a high frequency, upward-directed t... | 04/19/1994 |
| 5303257 | Carrier frequency correction for a DSSS communication system Method for carrier frequency correction in a direct sequence code division multiple access communication system having a carrier frequency, consisting of an expected carrier frequency and a carrier frequency error, modulated by a pseudo-noise code. A loca... | 04/12/1994 |
| 5291517 | Carrier freuency corrector for a DSSS communication system A carrier frequency corrector for a receiver for use in a direct sequence code division multiple access communication system having a carrier frequency consisting of an expected carrier frequency and a carrier frequency error, modulated by a pseudo-noise ... | 03/01/1994 |
| 5268931 | Data communication system In a data communication system, apparatus provides a clock signal having a frequency of twice the frequency of a first clock signal. A time delay circuit delays the first clock signal by a time delay to provide a delayed first clock signal. An exclusive O... | 12/07/1993 |
| 5237541 | Platform carried bistatic sonar A platform borne sonar system for the detection of targets includes a transmitting projector suspended beneath the water surface from a platform for generating a virtual parametric acoustic array in a water column, forming a beam of acoustic energy. The b... | 08/17/1993 |
| 5235558 | Choke point bistatic sonar A sonar system for use in a water body includes a projector on the bottom of a water body for generating and transmitting a direct beam of acoustic energy. A receiving array is immersed in the water body outside the direct beam for detecting reflections f... | 08/10/1993 |
| 5231414 | Center-fed leaky wave antenna An antenna has a dielectric slab with an inner surface and an outer surface. The inner surface is mounted on a metal backplate. A radiating spiral is located on the outer surface of the dielectric slab and has a pitch of one wavelength at the design frequ... | 07/27/1993 |
| 5221445 | Method for determining identification and concentration of an atmospheric component Apparatus and method for determining the identity and concentration of a component in a test atmosphere having a known concentration of oxygen. At least one solid electrolyte oxygen sensor is used, with each sensor having a solid electrolyte wall in conta... | 06/22/1993 |
| 5218639 | Method and apparatus for changing bit rate of digitized analog Method and apparatus for changing the bit rate of a digitized analog signal stream from a first bit rate to a second bit rate. A first sequence generator provides a digital predictor sequence clocked at the first bit rate. A combiner has an output providi... | 06/08/1993 |
| 5168353 | Video distribution system allowing viewer access to time staggered indentical prerecorded programs System for distributing video programs includes a transmission system having a plurality of channels, includes a stored database representing a predetermined schedule including timing instructions. A computer is programmed to provide real time outputs in ... | 12/01/1992 |
| 5160357 | Container for electronic equipment A container providing environmental protection to electronic equipment includes a four sided frame, a front cover, and a rear cover. An exhaust fan is mounted on the rear cover and an air filter is mounted on said front cover to allow air to flow through ... | 11/03/1992 |
| 5138631 | Satellite communication network A satellite communication system has a hub earth station and a plurality of terminal earth stations. Each inbound satellite communication link from a terminal earth station to the hub earth station carries digital data packets encoded in CDMA code for cod... | 08/11/1992 |
| 5105295 | Four level FSK optical signal transmission with optical decoding and direct detection Apparatus for optical transmission of first and second digital channels. Each digital channel has first and second signal levels. The appparatus has a tunable laser for emitting an optical output at optical frequencies corresponding to current levels. Cur... | 04/14/1992 |
| 5099351 | Four level FSK optical signal transmission with optical decoding and coherent detection Apparatus for optical transmission of first and second digital channels. Each digital channel has first and second signal levels. The apparatus has a tunable laser for emitting an optical output at optical frequencies corresponding to current levels. An i... | 03/24/1992 |
| 5065165 | Microwave transition A transition includes a sheet of dielectric material having two parallel surfaces. A tapered recess in one surface converges towards the other surface with the axis of the recess orthogonal to said surface. The dielectric material has a critical angle of ... | 11/12/1991 |
| 5054064 | Video control system for recorded programs A video system includes a central facility and a terminal. Means are provided for playing a video recording medium storing a video program including a series of television fields including a first field containing both a random digital code encrypted acco... | 10/01/1991 |
| 5046092 | Video control system for transmitted programs A video system includes a central facility and a terminal. Means are provided for transmitting to the terminal a video program including a series of television fields including a first field containing both a random digital code encrypted according to a c... | 09/03/1991 |
| 5046090 | Recorded medium for video control system A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containi... | 09/03/1991 |
| 5005022 | Microwave antenna An antenna includes a sheet of dielectric material having two parallel surfaces. A tapered recess in one surface converges towards the other surface with the axis of the recess orthogonal to said surface. The dielectric material has a critical angle of re... | 04/02/1991 |
| 5003233 | Radio frequency powered large scale display A large scale video display has a plurality of colored electrodeless lamps which are excited by RF energy coupled from a RF cavity upon which the lamps are mounted. The lamps are easily replaced and do not degrade as fast as conventional lamps which have ... | 03/26/1991 |
| 4991208 | Video control system having session encryption key A video system includes a central facility and a terminal. Video program means for provides the terminal with a video program including a series of television fields including a first field containing both a random digital code encrypted according to a co... | 02/05/1991 |
| 4969186 | Telephone message waiting system and apparatus A system transmits information over telephone lines using ring signals. The ring signals have bursts of selectable duration separated by selectable time intervals between bursts. A ring signal translator receives the ring signals from telephone lines wher... | 11/06/1990 |
| 4920407 | Composite video frame store Apparatus stores a composite video frame including synchronization signals, color burst signals, and analog signals. The synchronization signals, color burst signals and analog signals of a video frame are sampled and digitized by circuitry: Two addressab... | 04/24/1990 |
| 4914603 | Training neural networks A method of training an artificial neural network uses a computer configured as a plurality of interconnected neural units arranged in a layered network including an input layer having a network input, and an output layer having a network output. A neural... | 04/03/1990 |
| 4912647 | Neural network training tool A method of training an artificial neural network uses a first computer configured as a plurality of interconnected neural units arranged in a network. A neural unit has a first subunit and a second subunit. The first subunit has first inputs and a corres... | 03/27/1990 |
| 4912652 | Fast neural network training A method of accelerating the training of an artificial neural network uses a computer configured as an artificial neural network with a network input and a network output and having a plurality of interconnected units arranged in layers including an input... | 03/27/1990 |
| 4912653 | Trainable neural network A trainable artificial neural network includes a computer configured as a plurality of interconnected neural units arranged in a layered network. An input layer has a network input and an output layer has a network output. A neural unit has a first subuni... | 03/27/1990 |
| 4912654 | Neural networks learning method A method of accelerating the training of an artificial neural network uses a computer configured as an artificial neural network with a network input and a network output, and having a plurality of interconnected units arranged in layers including an inpu... | 03/27/1990 |
| 4912655 | Adjusting neural networks A method of accelerating the training of an artificial neural network uses a computer configured as an artificial neural network with a network input and a network output, and having a plurality of interconnected units arranged in layers including an inpu... | 03/27/1990 |
| 4912651 | Speeding learning in neural networks A method of accelerating the training of an artificial neural network uses a computer configured as an artificial neural network with a network input and a network output, and having a plurality of interconnected units arranged in layers including an inpu... | 03/27/1990 |
