Patents by Inventor Jeffery D. Spence

Jeffery D. Spence 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).

  • Cleanout port for gas-operated firearms
    Patent number: 8109196
    Abstract: An improved gas tube system for a firearm having a gas tube with a distal end that is selectively openable to permit access to the distal end of the gas tube for cleaning thereof.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: February 7, 2012
    Inventor: Jeffery D. Spence
  • Gas venting system for firearms
    Patent number: 8109195
    Abstract: A gas operated firearm having a gas venting system which configures the carrier key and the gas tube so that a substantial portion of the recoil gas is vented from the gas tube into the cavity defined by a hand guard to reduce fouling and high temperatures associated with conventional venting systems which route gases into the receiver.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: February 7, 2012
    Inventor: Jeffery D. Spence