Patents Assigned to Canadian Department of National Defence
  • Non-resonant microwave frequency halver
    Patent number: 4609893
    Abstract: A broadband non-resonant microwave frequency halver which simultaneously decouples the input frequency from the output port through phase cancellation and couples the subharmonic frequency to the output port through phase addition providing good isolation between input and output over a very broad frequency range. The implementation of this circuit specifically excludes resonant, or frequency dependent elements and therefore has a much broader band of operation than previous circuits which relied on resonant phenomena.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: September 2, 1986
    Assignee: Canadian Department of National Defence
    Inventor: William D. Cornish
  • Coating of granulated organic dyes with an epoxy
    Patent number: 4225368
    Abstract: This invention relates to organic dye compositions of improved mechanical properties and to a method of coating the dye with an inert coating material which enables the production of pour-castable colored smoke-producing compositions of high solids loading, particularly when a red dye e.g. Disperse Red 9, is employed.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: September 30, 1980
    Assignee: Canadian Department of National Defence
    Inventors: Joseph E. G. Couture, Joseph N. A. Roy