Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 6741572 | Architectures for communication networks In a communications network comprising a plurality of interconnected nodes, each node comprises at least one network device requiring allocated transmission channels, a switch connected to the network device for configuring transmission channels connected to other n... | 05/25/2004 |
| 6128649 | Dynamic selection of media streams for display One or more streams from a number of real-time video streams available to be transmitted across a communications network, are selected for display on respective terminals of a first, and at least one other user. First, a policy of the first user for makin... | 10/03/2000 |
| 6070192 | Control in a data access transport service In a Data Access Transport Service (DATS), Data Service Providers (DSPs) share dial-in access (e.g. analog modem or Integrated Services Digital Network (ISDN) access) resources from a common pool maintained by a Local Exchange Carrier (LEC) (or potentiall... | 05/30/2000 |
| 6011846 | Methods and apparatus for echo suppression In methods and apparatus for suppressing echo of a far end signal encoded using LPC-based compression in a near end signal encoded using LPC-based compression, parameters of each frame of the near end encoded signal are processed without synthesizing a sp... | 01/04/2000 |
| 5943645 | Method and apparatus for computing measures of echo In methods and apparatus for computing measures of echo of a far end signal in a near end signal, the evolution over time of frequency spectra of the near end and far end signals are compared to compute a measure of the echo. A far end spectrum of the far... | 08/24/1999 |
| 5893056 | Methods and apparatus for generating noise signals from speech signals In methods and apparatus for generating an LPC-encoded noise signal from an LPC-encoded speech signal, excitation parameters of the LPC-encoded speech signal for a current frame are randomized upon detection of speech in the current frame. For frames in w... | 04/06/1999 |
| 5774847 | Methods and apparatus for distinguishing stationary signals from non-stationary signals In methods and apparatus for distinguishing stationary signals from non-stationary signals, a set of Linear Predictive Coding (LPC) coefficients characterizing spectral properties of the signal for each of a plurality of successive time intervals, includi... | 06/30/1998 |
| 5711000 | Topology verification process for controlling a personal communication services system A topology verification process for controlling a Personal Communication Services (PCS) system which includes a plurality of Cordless Fixed Parts (CFP)s. The process includes mapping the spatial relationships of the CFPs utilizing Received Signal Strength... | 01/20/1998 |
| 5644680 | Updating markov models based on speech input and additional information for automated telephone directory assistance In methods and apparatus for at least partially automating a telephone directory assistance function, directory assistance callers are prompted to speak locality or called entity names associated with desired directory listings. A speech recognition algor... | 07/01/1997 |
| 5642464 | Methods and apparatus for noise conditioning in digital speech compression systems using linear predictive coding In methods and apparatus for processing a speech signals comprising a plurality of successive signal intervals, each signal interval containing no speech sounds is classified as a noise interval, and LPC coefficients are calculated for each noise interval... | 06/24/1997 |
| 5586207 | Methods and assemblies for packaging opto-electronic devices and for coupling optical fibers to the packaged devices In methods and assemblies for packaging opto-electronic devices and for coupling optical fibers to the packaged devices, a housing has a cavity for receiving an opto-electronic device and an opening into the cavity. A window is placed across the opening t... | 12/17/1996 |
| 5579381 | Methods and apparatus for providing suppressed ringing access In methods and apparatus for providing suppressed ringing access to a subscriber line, a connection request is sent from a server to a telecommunications switch and the switch performs a connection routine in response to the connection request to connect ... | 11/26/1996 |
| 5513029 | Method and apparatus for monitoring performance of optical transmission systems In methods and apparatus for monitoring the performance of optical transmission systems, an optical signal is modulated with a low frequency dither signal to provide a modulated optical signal having a known modulation depth. A portion of the optical sign... | 04/30/1996 |
| 5506869 | Methods and apparatus for estimating carrier-to-interference ratios at cellular radio base stations In methods and apparatus for estimating carrier-to-interference ratios of signals transmitted between cellular radio base stations and mobile units, a SAT signal is transmitted from a base station to a mobile unit served by that base station. The mobile u... | 04/09/1996 |
| 5488652 | Method and apparatus for training speech recognition algorithms for directory assistance applications In methods and apparatus for at least partially automating a telephone directory assistance function, directory assistance callers are prompted to speak locality or called entity names associated with desired directory listings. A speech recognition algor... | 01/30/1996 |
| 5461225 | Sampling methods and apparatus In novel sampling methods and apparatus, a repetitive waveform is sampled at a sampling phase which alternates at a phase alternation frequency between a fixed reference phase and a variable phase while changing the variable phase progressively and period... | 10/24/1995 |
| 5432480 | Phase alignment methods and apparatus In methods and apparatus for controlling a phase relationship of two signals, a supplementary phase adjustment signal is generated. The supplementary phase adjustment signal has a zero value when an actual phase relationship of the two signals deviates fr... | 07/11/1995 |
| 5406209 | Methods and apparatus for testing circuit boards In methods and apparatus for non-contact testing of an electronic circuit board at least one electromagnetic emission sensing probe is disposed a short distance from a circuit board under test, the circuit board is operated while sensing electromagnetic e... | 04/11/1995 |
| 5363457 | Optical phase-modulating devices and methods for their operation A semiconductor-based optical phase-modulating device has first and second pairs of phase-fixing electrodes bracketing a pair of phase-modulating electrodes. The phase-fixing electrodes fix electric fields across end regions of the phase-modulating device... | 11/08/1994 |
| 5353025 | Methods and apparatus for digitally encoding repetitive analog waveforms In methods and apparatus for encoding a repetitive analog waveform as m n-bit digital words, p analog samples of the repetitive waveform are taken at each of m distinct sampling points, and q bits are derived from each distinct sample, where m, n, p and q... | 10/04/1994 |
| 5349587 | Multiple clock rate test apparatus for testing digital systems In methods and apparatus for testing a digital system, scannable memory elements of the digital system are configured in a scan mode in which the memory elements are connected to define a plurality of scan chains. A test stimulus pattern is clocked into e... | 09/20/1994 |
| 5334951 | Phase lock loops and methods for their operation A phase lock loop comprises a voltage controlled oscillator, a phase detector and a loop filter comprising a charge pump and a filter network. The voltage controlled oscillator generates an output signal having a frequency which is responsive to a control... | 08/02/1994 |
| 5323400 | Scan cell for weighted random pattern generation and method for its operation A scan cell comprises a flip-flop, a mode selector and a weighting network. The mode selector responds to a mode-select signal by selectively applying a circuit data input signal or a scan data input signal to a data input of the flip-flop. The weighting ... | 06/21/1994 |
| 5313469 | Self-testable digital integrator A self-testable digital integrator comprises binary adding apparatus and storage apparatus. The adding apparatus and the storage apparatus are functionally interconnected such that the storage apparatus feeds digital words to the adding apparatus for addi... | 05/17/1994 |
| 5306970 | Sense amplifier and method for its operation In a self-latching sense amplifier, a first pair of matched transistors is connected as a differential pair. A second pair of matched transistors is connected each to a respective one of the transistors of the first pair as a load transistor. A feedback c... | 04/26/1994 |
| 5287024 | FET bidirectional switching arrangements and methods for preventing pn junctions of FETs from being forward-biased A FET bidirectional switching arrangement comprises first and second FETs, and a limiting arrangement connected to the FETs. The FETs are operable in response to a first bias condition to pass current in series through the FETs in either of two opposite d... | 02/15/1994 |
| 5276446 | Analog-to-digital converter with error signal compensation and method for its operation In an analog to-digital converter, an analog signal is applied to a signal node of a binary weighted capacitor array during a sampling interval to charge capacitors of the capacitor array. A reference voltage is selectively applied to individual capacitor... | 01/04/1994 |
| 5259047 | Methods for determining optical fiber joint loss and joint elements useful in those methods Optical fiber joint loss is determined by launching an optical signal in an upstream fiber and measuring the launched signal at an end of the upstream fiber which is to be joined to a downstream fiber, joining the upstream fiber to the downstream fiber an... | 11/02/1993 |
| 5241613 | Optical fiber coupling/connector element An optical fiber connector element comprises a ferrule and an optical fiber stub secured within a through passage of the ferrule. The optical fiber stub comprises a core, an inner cladding having a diameter no more than six times the core diameter and a r... | 08/31/1993 |
| 5187767 | Optical fiber prooftester and method for its use An optical fiber prooftester for exerting a controlled tensile force on spliced optical fibers includes a base member, a first optical fiber clamp in the form of a coil spring attached to the base and a sliding member mounted for movement on the base memb... | 02/16/1993 |
| 5187713 | Nonlinear device control methods and apparatus In methods and apparatus for controlling the D.C. bias point of a nonlinear device, asymmetric envelope modulation is applied to an input signal, and the nonlinear device is driven by the asymmetric envelope-modulated signal and a D.C. bias signal. A nonl... | 02/16/1993 |
| 5185581 | Differential amplifier and high frequency resonant circuits constructed therefrom A differential amplifier includes a bias current source and a current dividing circuit for controllably dividing a bias current between first and second current paths. A first pair of matched transistors is connected as a differential pair between matched... | 02/09/1993 |
| 5172076 | Resonant circuit formed of two amplifiers connected in a loop and multiple resonator circuits constructed therefrom A resonant circuit comprises first and second amplifiers. An input of the second amplifier is coupled to an output of the first amplifier, and an output of the second amplifier is cross-coupled to an input of the first amplifier. The first amplifier has a... | 12/15/1992 |
| 5151961 | Ferrule alignment assembly for blind mating optical fiber connector An assembly for axially aligning two ferrules comprises a first housing, an alignment sleeve carrier, an alignment sleeve retained within a passage of the alignment sleeve carrier and a nut for securing the alignment sleeve carrier to the first housing su... | 09/29/1992 |
| 5133033 | Optical fiber mechanical splice and method for its use An optical fiber mechanical splice comprises a pair of gripping members and a resilient biasing member. Each gripping member has a plastically deformable griping surface. One of the gripping surfaces has a v-groove for receiving and aligning optical fiber... | 07/21/1992 |
| 5104823 | Monolithic integration of optoelectronic and electronic devices In the monolithic integration of HFET and DOES device, a wide band gap carrier confining semiconductor layer is provided only at predetermined locations where DOES devices are desired. This layer is not provided at other predetermined locations where HFET... | 04/14/1992 |
| 5081655 | Digital phase aligner and method for its operation In methods and apparatus for aligning the phase of a local clock signal with the phase of a data signal, an incoming data signal is delayed to provide a delayed data signal and regenerated with a local clock signal to provide a regenerated data signal. A ... | 01/14/1992 |
| 5035916 | Optical waveguide and method for its manufacture An optical waveguide is made by forming a layer of SiO2 on a substrate and implanting a region of the SiO2 layer with Si ions to define a region containing a stoichiometric excess of Si which defines a region having an elevated refra... | 07/30/1991 |
| 5027178 | Electrically tunable interference filters and methods for their use An electrically tunable interference filter comprises a semiconductor body which has a plurality of semiconductor layers. Each semiconductor layer comprises first and second sublayers which together define a heterojunction and first and second portions wh... | 06/25/1991 |
| 5015600 | Method for making integrated circuits In a method for making integrated circuits, a semiconductor substrate is provided which carries a plurality of unconnected devices of a first device type at regularly spaced regions of the substrate and a plurality of unconnected devices of a secound, dis... | 05/14/1991 |
