Patents Represented by Attorney Paul F. Wille
  • Patent number: 7294966
    Abstract: An EL panel on a rigid substrate is thinned in selected areas, or overall, to provide a backlight for keypads and other applications that would otherwise require a more flexible panel or additional structure. Lamp materials are deposited on one side of a rigid substrate and then substrate material is ablated with a suitable tool, working from the opposite side of the substrate as the lamp materials. The depth of cut can be constant or variable, enabling one to tailor the flexibility of an area to the desired tactile response for a keypad or to provide clearance in close quarters. The invention is compatible with known process for making an EL panel.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: November 13, 2007
    Assignee: World Properties, Inc.
    Inventor: Rodney T. Eckersley
  • Patent number: 7238535
    Abstract: An test cell is adapted for both making and testing samples. The cell includes a bottom plate and a top plate having concentric apertures defining a central test cavity. A post attached to the bottom plate closes off the bottom of the test cavity. A slide closes off the top of the test cavity. The top of the post is spaced slightly from the underside of the slide to define a test cavity of substantially uniform thickness. The test cavity is filled with phosphor suspended in uncured resin, closed, and the resin is cured. Once cured, the sample is stable, although delicate, and can be re-measured several times with reproducible results. The measurement takes place in the cell, using a thin film of oil for wetting surfaces.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: July 3, 2007
    Assignee: World Properties, Inc.
    Inventors: Karen Ruth Brower, Roy Scott Chancellor, William A. Coghlan, Will Melvell Hooke, Jr., Curtis Henry Kempton, Alan C. Thomas
  • Patent number: 7202600
    Abstract: An electroluminescent panel includes a release layer, a first insulating layer on the release layer, a plurality of lamp layers on the first insulating layer, and a second insulating layer overlying the lamp layers. In accordance with one aspect of the invention, the first insulating layer and the second insulating layer include low molecular weight PVDF/HFP resin. In accordance with another aspect of the invention, at least one of the lamp layers includes a UV-cured resin and the remaining lamp layers include a heat-cured resin.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: April 10, 2007
    Assignee: World Properties, Inc.
    Inventors: Charles I. Zovko, P. Kevin Sysak
  • Patent number: 7190600
    Abstract: An inverter for supplying alternating current to an EL lamp includes a first charging path, a first discharging path, a second charging path, a second discharging path, the paths intersecting at a node, wherein the node is the output of the inverter from which the alternating current flows. The charging paths include inductive boost circuits having a common inductor.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: March 13, 2007
    Assignee: World Properties, Inc.
    Inventors: Kenneth Vi Ung, Harold Gee Yee, Robert Allen Kimball
  • Patent number: 7046792
    Abstract: The amplitudes of a signal on the microphone input of a telephone and a signal on the line input of the telephone are compared with each other and with two thresholds. The comparisons are sampled and the samples control an up-down counter. The count in the counter is compared with two thresholds and the results of the comparisons are used to control at least two accumulators. A first accumulator counts consecutive comparisons having the same result and a second accumulator counts up or down in accordance with the comparisons. The counts in the first and second accumulators are logically analyzed to determine whether to receive or transmit. A plurality of samples defines a window, at the end of which the up-down counter is reset. The accumulators store data from a plurality of windows.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: May 16, 2006
    Assignee: Acoustic Technologies, Inc.
    Inventors: Scott E. Harrow, Judy Mae Fong, Harold Downey
  • Patent number: 7033127
    Abstract: A drive mechanism under the floor of a minivan is coupled to the folding ramp by a rotating arm linkage, also located beneath the floor. The extension of the folding ramp is partially controlled by dynamic braking, i.e. using the electric motor as a generator and coupling the motor to an electrical load.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: April 25, 2006
    Assignee: Vantage Mobility International, LLC
    Inventors: Steven P. Ungetheim, William E. Gest, David H. Eaton, Jr.
  • Patent number: 7031461
    Abstract: An adaptive filter is programmed with an algorithm based on a normalized Least Mean Squares (nLMS) algorithm that adapts each sample time. The algorithm is modified to be more efficient in a variety of DSPs by computing multiple errors, one per sample, before updating coefficients. The update equation utilizes the multiple errors to achieve adaptation at a similar performance to known nLMS algorithms that adapt each sample time but without the instability that is observed in low echo-to-near-end-noise ratio (ENR) input conditions. Varying the relaxation step size prevents divergence. The DSP utilizes either one or more MAC units.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: April 18, 2006
    Assignee: Acoustic Technologies, Inc.
    Inventors: Charles Anthony Lipari, II, Alexander Volkov
  • Patent number: 7009346
    Abstract: An inverter is coupled to an EL lamp by a high pass filter including a series capacitor and a shunt resistor. The resistor is coupled in parallel with the EL lamp. The high pass filter has a time constant greater than 0.005 seconds and the capacitor has a capacitance at least ten times the capacitance of the EL lamp.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: March 7, 2006
    Assignee: World Properties, Inc.
    Inventors: Mahyar Vahabzadeh, Robert A. Kimball, William A. Coghlan
  • Patent number: 6990194
    Abstract: A telephone includes a transmit channel and a receive channel, each including a bank of sub-band filters having a VAD coupled one to each sub-band filter. Each VAD measures the spectral energy in a sub-band, compares the spectral energy to a first threshold, and produces an output signal representative of whether or not the first threshold is exceeded. The voice activity detector also includes a threshold circuit for calculating a dynamically adjustable noise threshold based upon averaged measured spectral energy. A wide band or system VAD monitors echo canceling circuitry to detect voice activity and double talk. A dynamic balance control circuit maintains the transmit and receive channels in a predetermined energy ratio during double talk.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: January 24, 2006
    Assignee: Acoustic Technology, Inc.
    Inventors: James R. Mikesell, Franklyn H. Story
  • Patent number: 6963642
    Abstract: A telephone includes a first channel having a microphone input and a line output, a second channel having a line input and a speaker output, and each channel having a plurality of band pass filters with their outputs coupled to a multiplex circuit. The multiplex circuit selects subsets of the signals in each channel in accordance with the magnitudes of the signals in each band. Thus, full duplex operation is provided in accordance with the spectral content of each channel. In one embodiment of the invention, the multiplex circuits initially allocate alternate bands within each channel and complementary bands between the channels, thereby emulating a complementary comb filter. Thereafter, bands are allocated according to spectral content.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: November 8, 2005
    Assignee: Acoustic Technology, Inc.
    Inventor: Samuel L. Thomasson
  • Patent number: 6931124
    Abstract: A soft mute circuit includes a programmable amplifier controlled by a register. Data is stored in the register from an adder that combines the current data in the register with a second number for increasing or decreasing the gain of the amplifier. A summation circuit includes a plurality of inputs coupled by gates to a summation node and the summation node is coupled to an input of the programmable amplifier. The gates are controlled by suitable logic for selecting input signals in any combination. A control loop maintains the gain of the amplifier at a predetermined level.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: August 16, 2005
    Assignee: Acoustic Technology, Inc.
    Inventors: Raymond Rubacha, Samuel L. Thomasson
  • Patent number: 6928160
    Abstract: A bulk delay estimating circuit matches time intervals representing a signal with time intervals representing an echo of the signal to identify the echo and estimate bulk delay. Bulk delay is estimated by computing (1, 2, . . . n) intervals representing the signal, computing (1, 2, . . . n) intervals representing an echo of the signal, computing absolute differences between corresponding intervals to produce n absolute differences, summing the n absolute differences, and providing an output indicating whether or not the sum is less than a predetermined amount. The intervals are determined by defining a plurality of numbered frames, comparing the energy of a signal during each frame with at least one threshold, storing the numbers of the frames in which the threshold is exceeded, and defining an interval as the period from one frame in which the threshold is exceeded to the next frame in which the threshold is exceeded.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: August 9, 2005
    Assignee: Acoustic Technology, Inc.
    Inventors: Samuel Ponvarma Ebenezer, Franklyn H. Story
  • Patent number: 6904146
    Abstract: Sub-band filtering, adaptive echo cancellation, and residual echo suppression are selectively and separately applied in hierarchical order under the control of a circuit that monitors four separate signals to determine n machine states. The number of machine states is further divided among m levels of noise in determining which, and how much of, sub-band filtering, adaptive echo cancellation, and residual echo suppression to use at any given time. A voice activity detector (VAD) is used to monitor each signal and provides statistical information in addition to whether or not a voice signal is detected. Sub-band filter, echo cancelling, and non-linear processing are not permitted to provide maximum reduction simultaneously. Even so, the invention provides at least 15 dB more echo suppression than systems without a sub-band filter bank series coupled with a non-linear processor in each channel.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: June 7, 2005
    Assignee: Acoustic Technology, Inc.
    Inventors: Steven M. Domer, Samuel L. Thomasson
  • Patent number: 6891809
    Abstract: Data is transferred by delaying an audio signal less than fifty milliseconds to produce a shadow signal and combining the shadow signal with the audio signal. The shadow represents the data to be transferred A telephone constructed in accordance with the invention has at least two, separate machine states, each of which includes operating in half duplex mode and two, separate machine states, each of which includes operating in full duplex mode. The state is selected based upon one or more shadows detected at the line input of the telephone.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: May 10, 2005
    Assignee: Acoustic Technologies, Inc.
    Inventors: John Charles Ciccone, Samuel L. Thomasson
  • Patent number: 6887027
    Abstract: An external lift for a scooter includes a load sensor actuated by rotation of the platform as a load is applied anywhere on the platform, a lock mechanism for preventing the platform from rotating in a loaded and raised position, and a lock mechanism for preventing the platform from rotating in an unloaded and raised position. A pair of shoes on a hold down prevent a scooter from leaving the lift unintendedly. The lift includes a fixed post and a moveable post. A roller coupled to the moveable post engages a small ramp on the end of the fixed post, thereby further stabilizing the lift and increasing the lifting capacity.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: May 3, 2005
    Assignee: Vantage Mobility International LLC
    Inventors: Neil Brendon O'Leary, William E. Gest
  • Patent number: 6847930
    Abstract: Voice activity is detected by comparing an analog signal with two voltage thresholds and producing data representing the energy of the signal. The data, in binary form, is compared with thresholds to determine voice activity. In accordance with another aspect of the invention, the thresholds are adjusted based upon statistical information. In accordance with another aspect of the invention, the data can be weighted to provide an indication of the quasi-RMS energy of an input signal. The input signal itself is not converted into digital form yet the data derived from the input signal has high resolution.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: January 25, 2005
    Assignee: Acoustic Technologies, Inc.
    Inventors: Justin L. Allen, Steven M. Domer
  • Patent number: 6818326
    Abstract: An EL panel includes a substrate 1-5 mils (0.25-1.26 mm) thick supported by a reinforcing frame screen printed or otherwised deposited in or on the panel.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: November 16, 2004
    Assignee: Durel Corporation
    Inventor: Charles I. Zovko
  • Patent number: 6806642
    Abstract: A light source producing predominantly blue light is tuned to the transmission bands of color LCD subpixels for optimum light transmission and color separation. The spectral output of the light source has three peaks located in the same areas of the spectrum where LCD color filters transmit most of the light, thereby providing a balanced white. It has been discovered that brightness enhancing films aid in the color conversion by enhancing the cascaded peaks, in addition to increasing the brightness of the light source.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: October 19, 2004
    Assignee: Durel Corporation
    Inventors: David G. Pires, Charles I. Zovko
  • Patent number: 6798881
    Abstract: A system for processing audio signals in two channels, wherein each channel includes a plurality of band pass filters for dividing the signal in each channel into a plurality of bands and a plurality of variable gain amplifiers coupled one each to a band pass filter. Control logic coupled to the variable gain amplifiers prevents the signals in adjacent bands within a channel from being attenuated simultaneously. The control logic attenuates the signals in one channel in accordance with the signal in the corresponding bands in the other channel. In some circumstances, the signal in the band in the one channel is attenuated.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: September 28, 2004
    Assignee: Acoustic Technologies, Inc.
    Inventor: Samuel L. Thomasson
  • Patent number: D547465
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: July 24, 2007
    Assignee: Lorient Polyproducts Ltd.
    Inventor: Robert McGowan Mann