Patents by Inventor Donald V. Williams

Donald V. Williams has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9144122
    Abstract: A lighting system is disclosed comprising an excitor which drives at least one reactor. The excitor is an electrical waveform generator that creates an AC waveform at a frequency between about 50 kHz and about 100 MHz. The reactor is an under-damped resonant circuit that includes a network of lighting elements. Reactive components are distributed among the lighting elements. These reactive components can regulate the current and voltage to individual lighting elements. The drive system is particularly useful for arrays of low-voltage lighting elements such as LEDs. It is fault tolerant in that the failure of individual elements need not affect the operation of remaining elements, and elements can be added and removed without affecting the serviceability of other elements.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: September 22, 2015
    Assignee: Intervention Technology PTY, LTD
    Inventors: Donald V Williams, David Dreyfuss
  • Patent number: 9031667
    Abstract: A method and device for inducing anaesthesia in mammals by the application of RF energy to create hyperthermia derived neural anaesthesia. An RF generator drives a plurality of electrodes placed in tissue surrounding the target nerve fiber to desiccate the desired length of nerve fiber to be desiccated in a single deployment. The device allows high-speed selection/de-selection of bipolar electrode pairs or sets under continuous RF excitation. Activation of electrode pairs is adapted in response to sensed current density and temperature (by electrodes not in the current discharge activation phase) in order to create lesions of complex and well defined shape necessary for the production of hyperthermia derived neural anaesthesia.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: May 12, 2015
    Assignee: InterventionTechnology Pty Ltd
    Inventor: Donald V. Williams
  • Publication number: 20150035449
    Abstract: A lighting system is disclosed comprising an excitor which drives at least one reactor. The excitor is an electrical waveform generator that creates an AC waveform at a frequency between about 50 kHz and about 100 MHz. The reactor is an under-damped resonant circuit that includes a network of lighting elements. Reactive components are distributed among the lighting elements. These reactive components can regulate the current and voltage to individual lighting elements. The drive system is particularly useful for arrays of low-voltage lighting elements such as LEDs. It is fault tolerant in that the failure of individual elements need not affect the operation of remaining elements, and elements can be added and removed without affecting the serviceability of other elements.
    Type: Application
    Filed: December 31, 2012
    Publication date: February 5, 2015
    Inventors: Donald V Williams, David Dreyfuss
  • Publication number: 20080262490
    Abstract: A method and device for inducing anaesthesia in mammals by the application of RF energy to create hyperthermia derived neural anaesthesia. An RF generator drives a plurality of electrodes placed in tissue surrounding the target nerve fibre to desiccate the desired length of nerve fibre to be desiccated in a single deployment. The device allows high-speed selection/de-selection of bipolar electrode pairs or sets under continuous RF excitation. Activation of electrode pairs is adapted in response to sensed current density and temperature (by electrodes not in the current discharge activation phase) in order to create lesions of complex and well defined shape necessary for the production of hyperthermia derived neural anaesthesia.
    Type: Application
    Filed: March 6, 2006
    Publication date: October 23, 2008
    Inventor: Donald V. Williams
  • Patent number: 5630164
    Abstract: A scientific instrument emulator is disclosed and comprises a computer (1) including a memory (3) and at least two processors (2,9). An analogue I/O module (6) is configured within the computer (1) and connects via a bus (11) thereby permitting conversion of analogue signals into digital signals for processing by the processors (9). The module (6) permits connection to monitoring and/or sampling devices such as transducers which permit analysis and recording of physical phenomena. The emulator is programmable via a library of processing functions stored in the memory (3) to adapt the processors (9) to emulate the operation of a plurality of scientific instruments thereby permitting display of monitored events on a VDU (10) in real-time and/or storage of data relating to the events in the memory (3). Data can also be recorded in analogue format using one or more tape recoders connectable to the module (6).
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: May 13, 1997
    Assignee: Associative Measurements Pty. Ltd.
    Inventors: Donald V. Williams, John B. Keeble, John D. Oates, Alejandro G. Campos