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Class Information
Number: 89/191.01
Name: Ordnance > Automatic > Gas piston type
Description: Devices having a gas-operated cylinder device, the movement of which operates the extracting and reloading mechanism of an automatic ordnance device.










Sub-classes under this class:

Class Number Class Name Patents
89/191.02 Annular piston 57
89/192 Gas piston compresses breech opening spring 28
89/193 Gas ports and/or regulators 112


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8701543 Adjustable gas system for firearms Apr. 22, 2014
8695260 Cartridges and modifications for M16/AR15 rifle Apr. 15, 2014
8689672 Anti-wear buffer device for bolt carrier assembly Apr. 8, 2014
8667882 Firearm Mar. 11, 2014
8667883 Firearm having gas piston system Mar. 11, 2014
8640372 Automatic or semi-automatic rifle Feb. 4, 2014
8640598 Sleeve piston for actuating a firearm bolt carrier Feb. 4, 2014
8607688 Multi-block gas regulator Dec. 17, 2013
8595970 Accessory mounting hand guard for firearm Dec. 3, 2013
8584574 Weapons, weapons housings and methods of producing such weapons and weapons housings Nov. 19, 2013
8584575 Firearm having a new gas operating system Nov. 19, 2013
8505433 Firearm with gas operating system Aug. 13, 2013
8468929 Firearm having gas piston system Jun. 25, 2013
8453364 Firearm having a removable hand guard Jun. 4, 2013
8443712 Gas-operated firearm May. 21, 2013
8443711 Gas operating systems, subsystems, components and processes May. 21, 2013
8387513 Self loading firearm bolt carrier with integral carrier key and angled strike face Mar. 5, 2013
8375616 Automatic rifle bolt carrier with fluted boss Feb. 19, 2013
8371209 Bolt carrier impingement device for a firearm Feb. 12, 2013
8356537 Ambidextrous charging handle Jan. 22, 2013
8342075 Receiver for an autoloading firearm Jan. 1, 2013
8336436 Ambidextrous cam style charging handle Dec. 25, 2012
8333137 Side handle firearm actuation system Dec. 18, 2012
8307750 Gas operated rifle with bolt carrier and receiver assembly Nov. 13, 2012
8297175 Rifle handguard Oct. 30, 2012
8286542 Gas piston retrofit for rifle Oct. 16, 2012
8272313 Heavy caliber firearm with enhanced recoil and control characteristics Sep. 25, 2012
8272314 Delayed gas-operated firearm Sep. 25, 2012
8261653 Firearm having a new gas operating system Sep. 11, 2012
8245625 Gas pressure mechanism in gas-operated firearm Aug. 21, 2012
8234808 Monolithic rail platform and bolt assemblies for a firearm Aug. 7, 2012
8201489 Gas system for an automatic firearm Jun. 19, 2012
8181563 Gas tappet system for a rifle May. 22, 2012
8176667 Firearm sensing device and method May. 15, 2012
8161864 Firearm gas piston operating system Apr. 24, 2012
8141474 Charging mechanism for gas powered firearms Mar. 27, 2012
8117958 Firearm with gas operating system Feb. 21, 2012
8104393 Charging handle Jan. 31, 2012
8056460 Bolt carrier for gas-operated firearms Nov. 15, 2011
7975595 Firearm Jul. 12, 2011
7975596 Firearm Jul. 12, 2011
7971518 Direct drive retrofit for rifles Jul. 5, 2011
7971382 Firearm Jul. 5, 2011
7938054 Gas spring for a revolver cannon or breech cannon May. 10, 2011
7938055 Law enforcement carbine with one piece receiver May. 10, 2011
7921760 Compact gas block with rail interface Apr. 12, 2011
7900546 Rifle charging handle with ambidextrous latch Mar. 8, 2011
7891284 Firearm with gas system accessory latch Feb. 22, 2011
7832326 Auto-loading firearm with gas piston facility Nov. 16, 2010
7798045 Charging handle with forward assist function Sep. 21, 2010

1 2 3










 
 
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