Patents by Inventor Colin A. Murdoch

Colin A. Murdoch 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).

  • Optical sighting devices
    Patent number: 4263719
    Abstract: An optical device for use as a gunsight, telescope or viewfinder is disclosed, the device being capable of indicating the distance of the target from the user. This is accomplished by a reticle in, or associated with, the sighting device, the reticle being calibrated to give the viewer an instant indication of range without requiring mechanical adjustments.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: April 28, 1981
    Inventor: Colin A. Murdoch