Patents by Inventor John L Frizzell

John L Frizzell 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).

  • Firearm muzzle brake
    Patent number: 9441901
    Abstract: A muzzle brake attachment for a firearm. The muzzle brake utilizes an inner perforated tube approximating or slightly larger than the bore diameter of a firearm barrel, and an un-perforated or substantially un-perforated outer shield tube. The muzzle brake substantially routes exhausted propellant gases out of the forward end of the muzzle brake, effectively controlling felt recoil while stabilizing the muzzle.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: September 13, 2016
    Assignee: RHF Firearm Products, LLC
    Inventors: Ronald T Harrison, John L Frizzell, Jeffrey A Robinson
  • Firearm muzzle brake
    Patent number: 9134084
    Abstract: A muzzle brake attachment for a firearm. The muzzle brake utilizes an inner perforated tube approximating or slightly larger than the bore diameter of a firearm barrel, and an un-perforated or substantially un-perforated outer shield tube. The muzzle brake substantially routes exhausted propellant gases out of the forward end of the muzzle brake, effectively controlling felt recoil while stabilizing the muzzle.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: September 15, 2015
    Assignee: RHF Firearm Products, LLP
    Inventors: Ronald T Harrison, John L Frizzell, Jeffrey A Robinson
  • Firearm muzzle brake
    Patent number: D746401
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: December 29, 2015
    Assignee: RHF Firearm Products, LLC
    Inventors: Ronald T. Harrison, John L. Frizzell, Jeffrey A. Robinson