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| Patent # | Description |
|---|---|
| US-4,841,575 |
Image encoding and synthesis Visual images of the face of a speaker are processed to extract during a learning sequence a still frame of the image and a set of typical mouth shapes. Encoding... |
| US-4,841,574 |
Voice buffer management In a signal processing environment, voice messages are stored into and read out of a buffer in real time. Since voice messages are being stored and read from the... |
| US-4,841,573 |
Stereophonic signal processing circuit A stereophonic signal processing circuit is designed to be provided with a pair of level compression circuits compressing peak levels of a pair of stereophonic... |
| US-4,841,572 |
Stereo synthesizer A stereo image enhancement system, in which difference signal components in relatively quieter difference signal frequency bands are boosted to provide an... |
| US-4,841,571 |
Privacy signal transmission system A privacy signal transmission system having a transmitter portion and a receiver portion. The transmitter portion digitizes an analog message signal and... |
| US-4,841,570 |
One-way transformation of information Method and apparatus are provided for one-way transformation of data according to multiplication and/or exponentiation modulo a prime number. An implementation... |
| US-4,841,569 |
Secure video distribution system A video distribution system (e.g., CATV or MATV) employs at least one channel having a reception-defeating jamming signal which changes frequency periodically... |
| US-4,841,568 |
Circuit arrangement for a telephone station with earth connection to the
central supply device A circuit arrangement for a telephone station with earth connection to the central supply device for the purpose of post-dialing signaling, operates ... |
| US-4,841,567 |
Memory device The memory device memorizes a number corresponding to a plurality of digits, for example, a unit phone number using a first memory array. A desired number is... |
| US-4,841,566 |
Hold and dial accessory for telephone instrument A hold and dial monitor accessory is provided for use with a conventional telephone instrument connected across a subscriber service pair extending from a... |
| US-4,841,565 |
Monolithically integratable telephone circuit for feeding a subscriber's
telephone line A telephone circuit, which may be monolithically integrated, for feeding a subscriber's telephone line which is coupled via the circuit to a supply voltage... |
| US-4,841,564 |
DC-supply arrangement for a telecommunication line A switched mode DC power supply circuit for a telecommunication line, including a switched converter for charging an output capacitor from a DC source. The... |
| US-4,841,563 |
Bucket type coin accumulation apparatus A bucket type coin accumulation apparatus includes a collection plate, a return plate, locking members, weights, and photodetectors. The collection and return... |
| US-4,841,562 |
Telephone VCR control The invention is an add-on device which allows programming of an existing VCR (video cassette recorder) via standard phone lines. With it attached to a VCR, the... |
| US-4,841,561 |
Operating default group selectable data communication equipment A modem which is provided with the operating parameters of a plurality of countries and can be made compatible with the country in which the modem is to be used... |
| US-4,841,560 |
Direct access test unit for central office A direct access test unit for enabling a craftsperson at a telephone facility remote with respect to a central office to test subscriber lines comprises a first... |
| US-4,841,559 |
Telephone network interface tester A device for interposing in a telephone service line for testing the service line and a telephone network attached to the service line. Included is a first... |
| US-4,841,558 |
Front plate for X-ray cassettes A front plate for X-ray film cassettes, is disclosed in which outer layers made up of carbon fiber reinforced resin layers are laid on both surfaces of an... |
| US-4,841,557 |
X-radiator with circulating pump for heat dissipation An x-radiator has heat-producing components therein which are enclosed in a housing filled with an insulating fluid surrounding the components. A circulating... |
| US-4,841,556 |
Plasma X-ray source A plasma X-ray source in which a discharge tube containing a pair of coaxial cylindrical electrodes is filled with a gas, a high voltage pulse from a charged... |
| US-4,841,555 |
Method and system for removing scatter and veiling glate and other
artifacts in digital radiography A method and system for reconstructing image data obtained from plural sequential exposures of an object by a radiation source through a multiple slit beam... |
| US-4,841,554 |
X-ray scanner for inspecting articles moving therethrough An x-ray scanner for inspecting articles moving therethrough, such as on a conveyor, has a frame on which an x-ray source, a collimator for the x-ray beam, and a... |
| US-4,841,553 |
Method of and apparatus for carrying out tomography The present invention provides an apparatus for carrying out tomography which is arranged in such a manner that a radiation source and a multichannel radiation... |
| US-4,841,552 |
Digital phase shifter A novel digital phase shifter is provided for accomplishing digital phase shifting without the requirement of complex multiplication. The phase shifter includes... |
| US-4,841,551 |
High speed data-clock synchronization processor The present invention generates a data clock for data processing circuitry by developing an optimum locally generated clock signal which is selected with each... |
| US-4,841,550 |
Universal null DTE A communication device in the form of data terminal equipment permits two data communication equipments, each having its own master clock and operating at... |
| US-4,841,549 |
Simple, high performance digital data transmission system and method A high performance asynchronous system and method for continuous communication of data from an originating station to a destination station. Data messages are... |
| US-4,841,548 |
Method and apparatus for extracting an auxiliary data clock from the
clock and/or the clock-phase of a... A method and apparatus for recovering the clock and/or the clock phase of a synchronous or plesiochronic digital signal provide that logic circuits in gate... |
| US-4,841,547 |
Digital communication system A digital communication system, in which digital information is represented by a quaternary information symbol (11, 01, 00, 10) and the double step phase shift,... |
| US-4,841,545 |
Synchronous tracking device for direct spread spectrum receiver A synchronous tracking device for a receiver in a direct-spread spectrum communication system in which a carrier frequency and a pseudo noise code for spreading... |
| US-4,841,544 |
Digital direct sequence spread spectrum receiver A direct sequence spread spectrum receiver for receiving an RF carrier radio signal modulated with a message signal in accordance with a code having a... |
| US-4,841,543 |
Probe for measuring the thermal conductivity of materials This invention relates to the measurement of thermal conductivity. The measuring probe according to the invention is characterized in that it comprises: a plate... |
| US-4,841,542 |
Electric furnace arrangement An electric furnace includes a furnace vessel arranged on a furnace platform and covered by a furnace lid liftable and lowerable by a lid lifting mechanism and... |
| US-4,841,541 |
Coupling of ring lasers An improved ring laser system having mutual coupling between two or more ring laser resonators employs a two-step coupling process, in which coupling power is... |
| US-4,841,540 |
Gas laser arrangement A gas laser arrangement includes a discharge tube arranged between a cathode and anode and including a central discharge channel and at least one gas return... |
| US-4,841,539 |
Gas laser discharge tube with ceramic wafers and cooling wafers in a
stack A relatively high power gas laser includes a laser discharge tube formed of stacked alternating cooling wafers and ceramic wafers, the cooling wafers being... |
| US-4,841,538 |
CO.sub.2 gas laser device A CO.sub.2 gas laser device comprises a plurality of divided cathode electrodes disposed in a linear row extending transversely across a high-speed flow of a gas... |
| US-4,841,537 |
Medium for gas laser excited by ionizing particles A medium for a gas laser excited by ionizing particles containing helium, neon, argon or krypton with a total concentration in excess of 10.sup.19 cm.sup.-3 with... |
| US-4,841,536 |
Semiconductor laser devices This invention discloses a semiconductor laser capable of a high temperature and high output operation by forming a mesa stripe having an active layer in a... |
| US-4,841,535 |
Semiconductor laser device A semiconductor laser device includes semiconductor layers including a semiconductor layer having a stripe groove having a reverse trapezoidal cross section and... |
| US-4,841,534 |
Buried type semiconductor laser device A buried type semiconductor laser device comprising a multi-layered epitaxial growth crystal including a striped laser-oscillation operating area on a... |
| US-4,841,533 |
Semiconductor laser device having a graded index waveguide A semiconductor laser device containing a laser oscillation-operating area comprising a superlatticed quantum well region which is composed of layers of GaAs... |
| US-4,841,532 |
Semiconductor laser A method for producing a semiconductor laser which comprises sequentially depositing a lower cladding layer, an active layer, and an upper cladding layer on a... |
| US-4,841,531 |
Semiconductor laser device A semiconductor laser having a double hetero structure comprises a cladding layer of In.sub.1-x-y Ga.sub.x Al.sub.y P.sub.1-z As.sub.z (0.ltoreq.x.ltoreq.1,... |
| US-4,841,530 |
Cr-doped scandium borate laser A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of MBO.sub.3 :Cr.sup.3+, where M is selected from the group... |
| US-4,841,529 |
System for generating a stable optical frequency A system for generating a stable optical frequency from a laser signal having inherent frequency fluctuations. The signal from an injection-controlled pulsed... |
| US-4,841,528 |
Frequency doubled, cavity dumped feedback laser Higher efficiency in cavity dumping and frequency doubling in a laser used to produce modulated output beam pulses is achieved by deflecting light out of the... |
| US-4,841,527 |
Stabilization of random access packet CDMA networks A CDMA network includes a retransmission scheduler which selectively delays the retransmission of an initially erroneously sent signal. The selected delays have... |
| US-4,841,526 |
Data communications system A data communications system employing sliding window protocol where the size of the window of the sending or receiving station can be made selectable by the... |
| US-4,841,525 |
Method and arrangement for testing mega-bit memory modules with
arbitrary test patterns in a multi-bit test mode For testing memory modules of the mega-bit generation in the multi-bit test mode with arbitrary test patterns, whereby m cells of the cell field are ... |
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