Patents by Inventor David J. Roscoe

David J. Roscoe 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).

  • Sensor-based augmentation of blockage recovery
    Patent number: 7177635
    Abstract: A method for improving long-term blockage recovery of a communications signal is disclosed. The method includes monitoring a blockage source using at least one application specific-sensor. Time spent in the blockage source is ascertained. Information obtained from the application-specific sensor may be combined with the ascertained time spent in the blockage source to predict a likely blockage recovery time interval.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: February 13, 2007
    Assignee: TransCore Link Logistics Corporation
    Inventors: Phil Lafleur, Wayne McPherson, Sean Faulkner, David J. Roscoe
  • Array feed for axially symmetric and offset reflectors
    Patent number: 5912645
    Abstract: In the past, parabolic offset reflector antennas were fed a signal through a corrugated horn in order to optimize field distribution and polarization at the reflector. It has been found that cost savings and other advantages are realized by using an array of radiating patches. The geometrical placement of the radiating patches and the power distribution to each patch is arranged such that radiated energy from the patches sums at the reflector surface to produce the predetermined field distribution and polarization.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: June 15, 1999
    Assignee: Her Majesty the Queen in Right of Canada, as Represented by the Minister of Industry through the Communications Research Centre
    Inventors: Jim Wight, David J. Roscoe