Patents by Inventor Frederick N. Dyer

Frederick N. Dyer 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).

  • Photosensitive cartridge for weapons zeroing and marksmanship training
    Patent number: 4653760
    Abstract: The invention provides a light sensitive dummy cartridge for insertion into he chamber of a magazine-type weapon. A muzzle collimator is inserted into the barrel in alignment with the cartridge photosensor and the longitudinal axis of the bore. The power supply, audible scoring apparatus, and electrical circuit for the photosensor, moreover, are mounted in a dummy magazine. This combination provides an easy-to-install apparatus for temporarily converting a conventional firearm into a photoresponsive training device.
    Type: Grant
    Filed: May 3, 1985
    Date of Patent: March 31, 1987
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Frederick N. Dyer, John R. Schjelderup