Patents by Inventor Hiroshi Ofuji

Hiroshi Ofuji 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).

  • Shotgun cartridge
    Patent number: 4389939
    Abstract: A shotgun cartridge comprising a charge of shot, each shot being coated with an illuminant, and a solid firing agent for firing the illuminant, so that upon firing the cartridge a marksman can trace the trajectories of the individual shots and the extent to which the charge of shot spreads.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: June 28, 1983
    Inventor: Hiroshi Ofuji