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| Patent # | Description |
|---|---|
| US-4,873,724 |
Multi-pulse encoder including an inverse filter In an encoder for use in encoding a speech signal into a plurality of excitation pulses within frames by the use of an autocorrelation and a cross-correlation... |
| US-4,873,723 |
Method and apparatus for multi-pulse speech coding A multi-pulse speech coder uses synthetic filters for generating crosscorrelated signals without pitch prediction and autocorrelated signals with pitch... |
| US-4,873,722 |
Multi-channel reproducing system A multi-channel reproducing system comprises main speakers for sounding an input audio signal as a main channel audio signal, a phase shifter supplied with the... |
| US-4,873,721 |
Device for starting charging in a pay phone The present invention relates to a device for starting telephone charging in a pay phone. The starting device essentially comprises a scrambler circuit (42) which is ... |
| US-4,873,720 |
Automatic dialer An automatic dialer, which generates a signal for selection of a communication line from a plurality of communication lines belonging to a plurality of common... |
| US-4,873,719 |
Enhanced calling number delivery service system A process for a telephone system is disclosed which is associated with customer premises equipment, such as a telephone set or other receiving equipment which... |
| US-4,873,718 |
Feature telephone integration device A feature telephone integration device is disclosed. The device is intended for use in a PBX-type environment for use in a telephone system. The present... |
| US-4,873,717 |
Call coverage arrangement A call coverage arrangement in which coverage personnel are informed of the switch-hook status of covered terminals by way of a single two-part indicator on the... |
| US-4,873,716 |
Path allocation arrangement for multi-terminal groups A method and apparatus for processing calls to a directory number, shared by a multiple number of terminals, in which a switching system selects a preferred... |
| US-4,873,715 |
Automatic data/voice sending/receiving mode switching device A terminal device sends/receivers data and voice signals through a low speed circuit to/from another device, while switching automatically data and voice... |
| US-4,873,714 |
Speech recognition system with an accurate recognition function A speech registration/recognition processing section is responsive to a speech input signal to be registered or recognized from a microphone to selectively... |
| US-4,873,713 |
Automatic telephone answering apparatus and method An automatic telephone answering apparatus answers and records incoming calls and then automatically dials, repeatedly if necessary, a remote telephone whose... |
| US-4,873,712 |
Telephone controlled interrupter circuit A control unit is inserted in the power lines that serve a vehicular telephone and an audio system. A power monitoring circuit detects current increases related... |
| US-4,873,711 |
Method and apparatus for remote talk/listen communication system A vehicle mounted mobile transceiver having a first and second frequency (11) communicates via a secondary mobile unit (51) with a short range portable unit... |
| US-4,873,710 |
Patient support A patient support includes a support surface and structure positioned about the support surface for lifting selected portions of the patient's body from the... |
| US-4,873,709 |
X-ray generator with grooved rotary anode An X-ray generator includes a vacuum vessel; a cathode disposed in the vacuum vessel for emitting an electron beam; a plurality of stators constituting an... |
| US-4,873,708 |
Digital radiographic imaging system and method therefor A digital radiographic imaging system which employs co-operative means for converting the x-rays to an optical image having enhanced quality and detecting said... |
| US-4,873,707 |
X-ray tomography phantoms, method and system A computed tomography system which includes both a high-energy imaging apparatus (such as an X-ray computed tomography device) and also one or more phantoms... |
| US-4,873,706 |
Electromechanical pulse counter An electromechanical pulse counter for counting applied current pulses includes a magnetizable disc-shaped armature mounted for rotation about a fixed axis.... |
| US-4,873,705 |
Method of and system for high-speed, high-accuracy functional testing of
memories in microprocessor-based units A method of and system of high-speed, high-accuracy functional testing of memories in microprocessor-based units or boards under test includes a test system that... |
| US-4,873,704 |
Method and apparatus for effectively doubling the operational speed of
selected digital circuits A method and apparatus for effectively doubling the operational speed of certain digital circuit designs. In particular, a digital clock operating at a first... |
| US-4,873,703 |
Synchronizing system A synchronizing system is provided for reliably passing data across a boundary between two independent, non-correlated clocks, referred to as the receiving and... |
| US-4,873,702 |
Method and apparatus for DC restoration in digital receivers A technique for eliminating unwanted dc offset voltages in a receiver for decoding a plurality of multilevel digitally modulated signals. The data transmission... |
| US-4,873,701 |
Modem and method for 8 dimensional trellis code modulation A modem and method for modulation-demodulation of a received analog signal. The modem receives sixteen bits at four bits per baud. The 8 D Block Encoder encodes... |
| US-4,873,700 |
Auto-threshold/adaptive equalizer An auto-threshold circuit in accordance with the present invention comprises a full-wave peak sensor for accurately estimating slice levels for input signal... |
| US-4,873,699 |
Method and device for coding and decoding a broadband transmission In a method of coding and decoding a broadband transmission of the spread spectrum type, the signal to be transmitted is encoded by modulation in accordance with... |
| US-4,873,698 |
Induction furnace crucible A crucible is disclosed for use in an induction furnace comprising a bottom wall and a circumferential sidewall. The sidewall comprises a plurality of vertically... |
| US-4,873,697 |
Narrowband laser transmitter having an external resonator from which the
output power can be taken A narrowband laser transmitter which has a semiconductor laser and an external optical resonator coupled to the semiconductor laser so that the output power of... |
| US-4,873,696 |
Surface-emitting lasers with periodic gain and a parallel driven nipi
structure A surface-normal cavity, AlGaAs, Distributed-Bragg Reflector laser. The laser is constructed on a GaAs substrate. There is a nipinipi . . . gain-producing active... |
| US-4,873,695 |
Laser with discharge in a turbulent transverse flow An active gas based on CO.sub.2 penetrates under pressure into a discharge chamber (20) via injection orifices (10) formed through the upstream face of said... |
| US-4,873,694 |
Switching configuration for PCM time division multiplex telephone
exchange having a central switching network... A switching configuration for PCM TDM telecommunication exchange insallations, having a central switching network and individual sub-switching networks is... |
| US-4,873,693 |
Apparatus and method for suppressing diffraction rings in a laser A laser comprises an interaction region formed by a wall surface of a capillary discharge tube which has been roughened along a continuous length thereof. This... |
| US-4,873,692 |
Pulsed tunable solid state laser A tunable solid state laser oscillator with very narrow spectral line width for pulsed output comprises a solid state laser medium that generates a laser beam... |
| US-4,873,691 |
Wavelength-tunable semiconductor laser A wavelength-tunable semiconductor laser having an active part and an external waveguide part is disclosed. The external waveguide part has a diffraction... |
| US-4,873,690 |
Optical switch Using a semi-conductor laser amplifier in reflection, an optical switch is achieved which can be applied as either an AND/OR, or a NAND/NOR, logic gate. The... |
| US-4,873,689 |
Method and apparatus for collecting errors in the digital data of a
television signal A method and apparatus for correcting errors in the digital data of a television signal, wherein the digital signals are Golay codes having 23 bits constituted... |
| US-4,873,688 |
High-speed real-time Reed-Solomon decoder A Galois Field error correction decoder is described which can correct an error in a received polynomial. The apparatus includes means for generating a plurality... |
| US-4,873,687 |
Failing resource manager in a multiplex communication system A method and apparatus for detecting and analyzing errors in a communications system is described. The method employs expert system techniques to isolate... |
| US-4,873,686 |
Test assist circuit for a semiconductor device providing fault isolation In a test assist circuit for a semiconductor device, an address input selector (14a) is so switched that an external address signal is supplied to an address... |
| US-4,873,685 |
Self-checking voting logic for fault tolerant computing applications An apparatus and method for providing self-checking voting logic for fault tolerant computing applications. The apparatus comprises a voting circuitry for... |
| US-4,873,684 |
Method and apparatus for multiplexing of input signals having differing
frequencies and demultiplexing same A time division multiplex transmission system for time division multiplexing a plurality of information signals having different sampling frequencies and... |
| US-4,873,683 |
TDMA radio system employing BPSK synchronization for QPSK signals
subject to random phase variation and... A time division multiple access (TDMA) radio system conveying a quadrature phase shift keying (QPSK) modulated data signal is disclosed. In order to overcome... |
| US-4,873,682 |
Digital key telephone system Communication paths in a digital key telephone system are operated by sequentially transferring bit states from origin channels associated with communication... |
| US-4,873,681 |
Hybrid optical and electronic packet switch A switch for receiving packets on optical fiber input trunks and for switching the packets to appropriate optical fiber output trunks is disclosed. The packet... |
| US-4,873,680 |
Apparatus and method for detecting and compensating for pit extension in
an optical disk recording system A system for storing and retrieving encoded data on an optical recording medium using pit edge detection is disclosed. The pit extension characteristics of a... |
| US-4,873,679 |
Optical information recording disk and optical information recording
disk apparatus An optical information recording disk and optical information recording disk apparatus which increase the recording capacity of data recorded on the disk, and... |
| US-4,873,678 |
Optical head and optical information processor using the same An optical head and an optical information processor using the optical head include a light source, focusing device for focusing a light beam which is emitted... |
| US-4,873,677 |
Charging apparatus for an electronic device An apparatus for charging a power storage device provided within an electronic device. A power source provides direct current which is alternated in direction... |
| US-4,873,676 |
Sonar depth sounder apparatus An improved microprocessor-controlled sonar depth sounder, which is automatically operative to detect and lock to the bottom of a body of water, fill in the... |
| US-4,873,675 |
Method and apparatus for seismic exploration of strata surrounding a
borehole A method and apparatus are disclosed for carrying out the seismic exploration of the strata which surrounds a borehole during the drilling of that borehole. A... |
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