Patents by Inventor Christopher Toumazou

Christopher Toumazou 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).

  • Implantable surface acoustic wave devices for long term clinical monitoring
    Patent number: 8764677
    Abstract: A surface or bulk acoustic wave device can be implanted in or worn on a human or animal body to monitor various parameters thereof. The device comprises a pair of interdigitated transducers spaced apart over the surface of a piezo-electric substrate that is exposed to the parameter to be monitored. The device is interrogated by a radio-frequency signal being supplied to one of the transducers and detected after reflection by the other transducer. The parameter is measured by comparison of the supplied and received signals.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: July 1, 2014
    Assignee: Imperial College Innovations Ltd.
    Inventors: Christopher Toumazou, Christopher Neil McLeod, Glenn Noel Robert Vandevoorde
  • Implantable Surface Acoustic Wave Devices for Long Term Clinical Monitoring
    Publication number: 20070282172
    Abstract: A surface or bulk acoustic wave device can be implanted in or worn on a human or animal body to monitor various parameters thereof. The device comprises a pair of interdigitated transducers spaced apart over the surface of a piezo-electric sub-strate that is exposed to the parameter to be monitored. The device is interrogated by a radio-frequency signal being supplied to one of the transducers and detected after reflection by the other transducer. The parameter is measured by comparison of the supplied and received signals.
    Type: Application
    Filed: December 14, 2004
    Publication date: December 6, 2007
    Inventors: Christopher Toumazou, Neil McLeod, Robert Vandevoorde
  • Audio signal processors
    Patent number: 7286675
    Abstract: An audio signal processor includes a tone control (23). The tone control comprises two low-pass filters (221, 222) operating in current-mode and a subtractor (223) which subtracts the output currents of the filters to produce a band-pass characteristic. Each filter is a tuneable log-domain current-mode filter comprising MOS transistors operating in weak inversion. The tone control is useful in audio signal processors, hearing aids and single-channel and multi-channel Cochlear implants.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: October 23, 2007
    Assignee: Imperial College of Science, Technology & Medicine
    Inventors: Graham O'Neill, Walter Germanovix, Christopher Toumazou