Patents by Inventor Curtis Douglas Frank

Curtis Douglas Frank 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).

  • Rowing device, digital pitch meter and other devices
    Patent number: 7472489
    Abstract: Electronic devices are provided to measure the angle between two arbitrary surfaces, using the local direction of gravity as an absolute direction reference. One case is an electronic device to measure the angle between the keel of a rowing shell and the oarlock pin.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: January 6, 2009
    Inventor: Curtis Douglas Frank
  • Rowing Device, Digital Pitch Meter and Other Devices
    Publication number: 20070209223
    Abstract: Electronic devices are provided to measure the angle between two arbitrary surfaces, using the local direction of gravity as an absolute direction reference. One case is an electronic device to measure the angle between the keel of a rowing shell and the oarlock pin.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 13, 2007
    Inventor: Curtis Douglas Frank