Duluth, Georgia
United States
3
2015-12-24
J. Patrick O'Brien from Duluth, US has applied for patents for these inventions. The list has both pending applications and granted patents:
CONCENTRIC CYLINDER GAS-OPERATED AUTOMATIC FIREARM
#2 | 2015-03-26Concentric cylinder gas-operated automatic firearm
#3 | 2012-06-07Concentric cylinder gas-operated automatic firearm
1107366 ⎘