Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8176833 | Firearm receiver with extended bridge A firearm receiver with an extended bridge is created to prevent the fully automatic fire of an assault rifle. The extended bridge receiver has a narrowed magazine well for a single stack removable magazine, safety catch with one or more grooves on its lower left ha... | 05/15/2012 |
| 7735409 | Conversion kit and method for a RUGER® 10/22® semi-automatic .22 caliber rim fire gun to shoot .17 mach 2 cartridges A conversion kit and method for converting the RUGER® 10/22® semi-automatic .22 caliber rim fire rifle to shoot .17 HM 2 cartridges utilizes the original bolt in the receiver and replaces the bolt operating handle with increased weight to replace the original bolt... | 06/15/2010 |
| 7373868 | Semi-automatic rifle Sa vz. 58 A semi-automatic sporting rifle is created by the modification of a fully automatic assault rifle Sa vz. 58. The semi-automatic rifle is constructed partly from original parts of the Sa vz. 58 assault rifle, i.e. bolt carrier, locking piece, striker, return mechanis... | 05/20/2008 |
| 7347023 | Machine guns having detachable barrels and methods operating the same Machine guns having detachable barrels and methods of operating the same are disclosed. An illustrated example firearm includes a housing; a removable barrel; a latch to releasably secure the barrel in the housing, the latch having a released state and a secured sta... | 03/25/2008 |
| 7337574 | Frame for a firearm A firearm frame which is adapted to be disposed in operative relationship as a component part of a firearm, the firearm having disposed in operative relationships each with one or more of the others, a barrel, a receiver, and at least one firing mechanism; wherein t... | 03/04/2008 |
| 7311032 | Firearms with gas pressure loading mechanisms Firearms employing gas pressure loading mechanisms are disclosed. An example firearm includes a single force receiving component containing a gas cylinder, and a barrel in communication with a cartridge chamber received in the force receiving component. The cartridg... | 12/25/2007 |
| 7302881 | Conversion kit and method for a ruger 10/22 semi-automatic .22 caliber rim fire rifle to shoot .17 mach 2 cartridges A conversion kit and method for converting the RUGER® 10/22® semi-automatic .22 caliber rim fire rifle to shoot .17 HM 2 cartridges utilizes the original bolt in the receiver and replaces the bolt operating handle with increased weight to replace the original bolt... | 12/04/2007 |
| 7293385 | Modular trigger group for firearms and firearm having a modular trigger group A module housing is adapted to be inserted into an operating position in the trigger group receiving area of a firearm. The module housing includes at least one pin receiver defined by two openings formed in the module housing, one on each lateral side of the housin... | 11/13/2007 |
| 7237469 | Firearms having a locked breech Firearms having a locked breech are disclosed. An example firearm includes a barrel; a bolt head; a firing pin having a bulge; a bolt head carrier having a forward position and a rearward position; a central force receiving component receiving a rear end of the barr... | 07/03/2007 |
| 7231864 | Reciprocating barrel firearm apparatus A firearm apparatus includes a gun housing which includes a barrel support channel between a front gun housing portion and an intermediate gun housing portion. A reciprocating barrel is housed inside the gun housing and includes a piston-sleeve-contained barrel port... | 06/19/2007 |
| 7162824 | Modular trigger group for firearms and trigger group installation method A module housing is adapted to be inserted into an operating position in the trigger group receiving area of a firearm. The module housing includes at least one pin receiver defined by two openings formed in the module housing, one on each lateral side of the housin... | 01/16/2007 |
| 7137219 | Machine guns having detachable barrels and methods of operating the same Machine guns having detachable barrels and methods of operating the same are disclosed. An illustrated example firearm includes a housing; a removable barrel; a latch to releasably secure the barrel in the housing, the latch having a released state and a secured sta... | 11/21/2006 |
| 7131228 | Modular firearm An M-4 firearm having a lower receiver assembly and an upper receiver assembly. The upper receiver assembly is connected to the lower receiver assembly. The lower receiver assembly has a fire control assembly. The upper receiver assembly has a barrel and a hand guar... | 11/07/2006 |
| 7121035 | Sight-preserving, partially self-cleaning, divergent-axis caliber conversion in handguns A conversion kit for converting a semi-automatic or self-loading handgun of a certain caliber, such as a Colt .45, is modified to allow the use therein of cartridges of a different, usually smaller caliber, thus to allow less expensive training on the handgun, where... | 10/17/2006 |
| 7069922 | Paintball marker internal reset system An internal reset system for paint ball markers. A hammer body as modified rearwardly to include an axial opening to receivably retain the forward head of a reset rod. The forward portion of the reset rod is thus free to reciprocate within the axial opening, but res... | 07/04/2006 |
| 7047684 | Short repeater rifle Short repeater rifle with a barrel, which has on one of its ends a cartridge receiver; a locking system; a trigger assembly with a trigger and a trigger guard; a firing mechanism; a magazine; and a targeting device, characterized in that the center of gravity of the... | 05/23/2006 |
| 7040213 | Firearm receiver system with belt-feed capability A firearm receiver system including a receiver body, an ammunition belt feeding assembly and a bolt carrier. The receiver body includes a first face and a second face approximately opposite the first face. The receiver body is configured for having means for trigger... | 05/09/2006 |
| 7000345 | Underbarrel shotgun A shotgun comprises a receiver made from a first material; barrel having a portion extending into the receiver and made from a second material; a collar nut securing the barrel to the receiver; a bolt assembly disposed within the receiver and including a locking blo... | 02/21/2006 |
| 6994011 | Firearm safety device A firearm safety device for installation into an otherwise functional firearm for disabling the firearm with respect to chambering and firing a round of ammunition and thereby enabling the firearm to be used as a training firearm. The functional firearm includes, am... | 02/07/2006 |
| 6971202 | Gas operated action for auto-loading firearms A gas operated action for auto-loading guns may comprise a receiver, a biasing spring, a bolt-carrier reciprocable within the receiver, a bolt having a cam pin, and an action rod fixedly attached to the receiver. The cam pin may engage the action rod during recoil t... | 12/06/2005 |
| 6968770 | Firearm safety device A firearm safety device for installation into an otherwise functional firearm for disabling the firearm with respect to chambering and firing a round of ammunition and thereby enabling the firearm to be used as a training firearm. The functional firearm includes, am... | 11/29/2005 |
| 6959509 | Quick change infinitely adjustable barrel nut assembly The present invention is a quick change and torque controlled barrel nut assembly for use on a variety of firearms. The invention is made up of a generally cylindrically shaped barrel nut configured to adaptably connect a barrel to a firearm, a gas tube ring that is... | 11/01/2005 |
| 6931978 | Rebound attenuation device for automatic firearms A blow-back operating automatic firearm has a sliding mass carried with its bolt carrier assembly to increase the dwell time of the bolt at the breech when the bolt is in battery position for firing. The sliding mass reduces the tendency of the bolt to bounce-off th... | 08/23/2005 |
| 6912806 | Device for a small arm The invention relates to a device for feeding cartridges (15) from magazines to small arms, in particular to rifles with a cartridge feed device (3-7, 25-29), which transports the cartridges from a tubular magazine (11) to the barrel (1) ... | 07/05/2005 |
| 6907814 | Automatic firearms with a detachable breech lock Firearm(s) with a breech lock are disclosed. One such firearm includes a first pivoting lever which, when actuated, releases the breech lock and a second lever, which when actuated also releases the breech lock. The first and second levers are located on opposite si... | 06/21/2005 |
| 6510778 | Automatic bolt hold-open assembly The present invention relates to an automatic bolt hold-open rotating assembly to convert a manual bolt hold-open function to an automatic bolt hold-open function in automatic and semi-automatic pistols and rifles, such as the Ruger 10/22 semi-automatic .... | 01/28/2003 |
| 5913261 | Trigger arrangement A trigger arrangement for an automatic weapon with switch-over between continuous firing and single-shot modes includes a hammer, a breechblock, a latch, a pivotably mounted trigger, and a firing lever. In the single-shot mode, the firing lever engages th... | 06/15/1999 |
| 5808229 | Non-tilt barrel for a semi-automatic handgun An improved non-tilt barrel for converting a conventional semi-automatic weapon from having a pivoting linkage between the barrel and the receiver to a weapon having a cam in order to reduce the recoil of the weapon and to increase the accuracy of the wea... | 09/15/1998 |
| 5799434 | Firearm with interchangeable mode cam A firearm conversion system for firearms having a pivoted hammer. The conversion system utilizes a plurality of different mode determinating cams which may be alternately mounted upon a shaft, the shaft also supporting the pivoted hammer. The cams each pr... | 09/01/1998 |
| 5705763 | Fire selector system for selecting between automatic and semi-automatic operation of a gun A fire selector system for selecting between automatic and semi-automatic operation of a gun is provided. The system is mountable on a reciprocating slide of the gun and into operative relationship with the trigger bar of the gun. A member of the selector... | 01/06/1998 |
| 5675106 | Blank firing conversions for semiautomatic pistols An automatic pistol adapted to repetitively fire blank ammunition includes a frame, a barrel unit supported by the frame and a slide unit reciprocally mounted on the frame between the forward and rear position. The barrel unit and/or frame incorporate str... | 10/07/1997 |
| 5663522 | M60 semi-automatic conversion The M60 semi-automatic rifle (SAR) is a near clone of the U.S. military M60 machinegun, except the rifle is a modified version of the military gun. The M60 semi-automatic rifle differs functionally because it fires a single round with each pull of the tri... | 09/02/1997 |
| 5614691 | Striking mechanism for semi-automatic operation of rifles and the like A striking mechanism (20) for the semi-automatic operation of a cartridge firing firearm (10) providing, in combination, a receiver (12); a barrel (11) attached to the receiver; a gas operated slide assembly (13) providing a slide (14) movable within the ... | 03/25/1997 |
| 5596162 | Firearm selectable between semi-automatic and automatic mode A pistol is disclosed which is selectable between automatic and semi-automatic operation. A device is provided which permits existing semiautomatic firearms to be converted so that they may be fired in either fully automatic or semiautomatic mode. A novel... | 01/21/1997 |
| 5585589 | Blank firing conversions for semiautomatic pistols An automatic pistol adapted to repetitively fire blank ammunition includes a frame, a barrel unit supported by the frame and a slide unit reciprocally mounted on the frame between the forward and rear position. The barrel unit and/or frame incorporate str... | 12/17/1996 |
| 5448940 | Gas-operated M16 pistol A modified M16 pistol capable of firing rifle cartridges therein in automatic or semi-automatic mode, which pistol is based upon modified M16 upper and lower assemblies, with a pistol barrel, an M16 gas actuation system, and a spring-biased buffer system ... | 09/12/1995 |
| 5351598 | Gas-operated rifle system An M16 type rifle is disclosed having a gas piston assembly with a relatively large piston area and sufficient stroke to actuate the M16 bolt carrier assembly in order to allow the M16 rifle to be chambered for short low-pressure pistol cartridges such as... | 10/04/1994 |
| 5272956 | Recoil gas system for rifle In an automatic weapon system such as the AR-15/M-16, the passage of propellant gas-carried heat, powder residues, and dirt to the bolt carrier and the upper receiver of the weapon is eliminated. The standard recoil spring housed in the buttstock of the w... | 12/28/1993 |
| 5046275 | Conversion kit for semiautomatic weapons An improvement for a caliber conversion kit for semiautomatic and automatic firearms to allow the use of smaller caliber ammunition within. The conversion kit comprises the replacement of the bolt, barrel and magazine clip of the existing firearm so that ... | 09/10/1991 |
| 4920678 | Conversion kit for semiautomatic weapons An improvement for a caliber conversion kit for semiautomatic and automatic firearms to allow the use of smaller caliber ammunition within. The conversion kit comprises the replacement of the bolt, barrel and magazine clip of the existing firearm so that ... | 05/01/1990 |
