Patents by Inventor John Oldham

John Oldham 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: 8768121
    Abstract: A filter and a method of filtering a high frequency electrical signal using photonic components is disclosed. The filter has a serially fiber-coupled laser source, a modulator, a filter, and a photodetector. The electrical signal is applied to the modulator. The modulated light propagates through the filter which is constructed to pass not only a modulated sideband, but also at least a fraction of light at the carrier frequency of the laser. The photodetector detects a signal at the beat frequency between the carrier and sideband signals, after both signals have propagated through the filter. As a result, a separate optical branch for light at the carrier frequency is not required, which considerably simplifies the filter construction and makes it more stable and reliable.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: July 1, 2014
    Assignee: Her Majesty the Queen in Right of Canada, as Represented by the Minister of Industry, Through the Communications Research Centre Canada
    Inventors: Howard Rideout, Joe Seregelyi, Ping Lu, Stéphane Paquet, Jianping Yao, Stephen J. Mihailov, John Oldham, Mario Caron
  • Publication number: 20100230621
    Abstract: A filter and a method of filtering a high frequency electrical signal using photonic components is disclosed. The filter has a serially fiber-coupled laser source, a modulator, a filter, and a photodetector. The electrical signal is applied to the modulator. The modulated light propagates through the filter which is constructed to pass not only a modulated sideband, but also at least a fraction of light at the carrier frequency of the laser. The photodetector detects a signal at the beat frequency between the carrier and sideband signals, after both signals have propagated through the filter. As a result, a separate optical branch for light at the carrier frequency is not required, which considerably simplifies the filter construction and makes it more stable and reliable.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 16, 2010
    Inventors: Howard RIDEOUT, Joe SEREGELYI, Ping LU, Stéphane PAQUET, Jianping YAO, Stephen J. MIHAILOV, John OLDHAM, Mario CARON
  • Patent number: 7284928
    Abstract: A quick disconnect assembly used for hand powered tools which consist of two separate units: a quick disconnect receiving assembly and an implement head attachment. When used together they will allow for a quick connection and release between a tool head and a handle. The first unit is a female receiving unit (quick disconnect receiving assembly) which consist of a exterior cylindrical shaped body throughout. One end being of cylindrical shape (handle sleeve and handle end) to receive a round to oval shaped handle and the opposite end having a hex shaped interior body (hex shaft receiver and hex shaft end). The second unit making up the quick disconnect assembly device is a male hex shaft implement head attachment.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: October 23, 2007
    Inventors: Ricardo Perez, John Oldham
  • Publication number: 20070157992
    Abstract: Multiple AC servo motors having low weight moment of inertia (Wk2) characteristics are drivingly inter-connected to form a veneer lathe drive system. Two, three or four motors can be drivingly coupled to one another and to drive spindles located on either or both sides of the lathe.
    Type: Application
    Filed: December 16, 2005
    Publication date: July 12, 2007
    Applicant: Arrow Speed Controls Limited
    Inventor: John Oldham
  • Publication number: 20050271466
    Abstract: A quick disconnect assembly used for hand powered tools which consist of two separate units: a quick disconnect receiving assembly and an implement head attachment. When used together they will allow for a quick connection and release between a tool head and a handle. The first unit is a female receiving unit (quick disconnect receiving assembly) which consist of a exterior cylindrical shaped body throughout. One end being of cylindrical shape (handle sleeve and handle end) to receive a round to oval shaped handle and the opposite end having a hex shaped interior body (hex shaft receiver and hex shaft end). The second unit making up the quick disconnect assembly device is a male hex shaft implement head attachment.
    Type: Application
    Filed: April 19, 2005
    Publication date: December 8, 2005
    Inventors: Ricardo Perez, John Oldham