Abstract: A system including: one or more processors; a memory storing instructions that, when executed by the one or more processors are configured to cause the system to: receive a plurality of user names and a plurality of anonymized user identifiers; receive a plurality of user attributes associated with one or more users of the plurality of users; receive a first plurality of hash values that uniquely identify an association between each user attribute and one or more users; receive a first request for a listing of user names associated with a first user attribute; receive a first secret key; generate a second plurality of hash values; determine a first subset of the first plurality of hash values that match the second plurality of hash values; generate a first graphical user interface including the listing of user names; and transmit the first graphical user interface to the first user device.

Abstract: A system including: one or more processors; a memory storing instructions that, when executed by the one or more processors are configured to cause the system to: receive a plurality of user names and a plurality of anonymized user identifiers; receive a plurality of user attributes associated with one or more users of the plurality of users; receive a first plurality of hash values that uniquely identify an association between each user attribute and one or more users; receive a first request for a listing of user names associated with a first user attribute; receive a first secret key; generate a second plurality of hash values; determine a first subset of the first plurality of hash values that match the second plurality of hash values; generate a first graphical user interface including the listing of user names; and transmit the first graphical user interface to the first user device.

Abstract: A boresighter/trainer fits into a distal end of a gun barrel and includes a sound sensor, a circuit, a laser, and a power source. The boresighter/trainer has at least two operational modes: one in which it continuously emits laser light and one in which it emits laser light for a short duration when the sound of a firing pin is detected. When in its first mode, the boresighter/trainer permits laser light to be projected along the longitudinal axis of a gun barrel in which it is portioned, for the purpose of aligning a sight on the firearm. When the boresighter/trainer is in its second mode and the firing pin of the gun is activated, the sound of the firing pin is detected by the sound sensor and activates a circuit in the boresighter/trainer to cause the light source to emit light along the longitudinal axis of the firearm barrel. The boresighter/trainer may have multiple bore adapters that fit different firearm bore diameters.

Abstract: A device incorporates a light source, a power source, and a control unit. The device has two operating modes and a switch to select one of the two modes. In a first operating mode the light source has a first control function wherein it emits light and a second control function wherein it does not emit light. In a second mode the light source emits light when the sound of a gun firing pin is detected.

Abstract: A slide for an automatic pistol includes a cavity, a housing in the cavity, a laser module at least partially received in the housing, a power source, circuitry, and a striker. The slide has a first mode in which it emits laser light and a second mode in which it does not emit laser light. The striker has a first position in which it does not cause the laser module to emit laser light. When the pistol's trigger is pulled, the pistol's firing pin contacts the striker and moves the striker backwards from the first position to a biased position. When the firing pin moves out of contact with the striker, the striker moves forward to a second position and causes the circuitry to transmit power from the power source to the laser module, which causes the laser module to emit laser light.

Abstract: A grip for use on a firearm includes a base surface, portions that are raised above the base surface, and/or portions that are lower than the base surface. The grip may include raised portions and lowered portions that alternate vertically and/or horizontally on the grip. The raised portions may be 0.005? to 0.050? above the surface, and the lowered portions may be 0.005? to 0.050? lower than the surface. The grip may be formed of any suitable material, such as plastic or rubber, and made in any suitable manner, such as injection molding or vacuum molding. The raised portions and/or lowered portions may include one or more of designs, letters, and numbers.

Abstract: A sighting/training device configured to be mounted to a pistol handle of a gun incorporates a light source, a power source, and a control. The device has at least two operating modes and a switch to select one of the modes. In a first operating mode the light source emits light when a button grip is pressed by a user, and does not emit light when the button grip is not depressed. In a second mode the light source emits light when a sound, such as the sound of a gun firing pin, is detected.

Abstract: A laser targeting apparatus rests on a surface and moves, such as by vibrating, wobbling, or shaking, when struck by laser light of sufficient intensity. The apparatus is designed not to fall over, so a user does not have to move to the apparatus and pick it up after a strike. The apparatus has a body that includes a structure, which is preferably one or more printed circuit boards including light sensors, for detecting strikes of laser light, and a motor. When a strike of laser light is detected, power is provided to the motor, which vibrates and causes the apparatus to move.

Abstract: A slide for an automatic pistol includes a cavity, a housing in the cavity, a laser module at least partially received in the housing, a power source, circuitry, and a striker. The slide has a first mode in which it emits laser light and a second mode in which it does not emit laser light. The striker has a first position in which it does not cause the laser module to emit laser light. When the pistol's trigger is pulled, the pistol's firing pin contacts the striker and moves the striker backwards from the first position to a biased position. When the firing pin moves out of contact with the striker, the striker moves forward to a second position and causes the circuitry to transmit power from the power source to the laser module, which causes the laser module to emit laser light.

Abstract: A laser targeting apparatus rests on a surface and moves, such as by vibrating, wobbling, or shaking, when struck by laser light of sufficient intensity. The apparatus is designed not to fall over, so a user does not have to move to the apparatus and pick it up after a strike. The apparatus has a body that includes a structure, which is preferably one or more printed circuit boards including light sensors, for detecting strikes of laser light, and a motor. When a strike of laser light is detected, power is provided to the motor, which vibrates and causes the apparatus to move.

Abstract: A laser targeting apparatus rests on a surface and moves, such as by vibrating, wobbling, or shaking, when struck by laser light of sufficient intensity. The apparatus is designed not to fall over, so a user does not have to move to the apparatus and pick it up after a strike. The apparatus has a body that includes a structure, which is preferably one or more printed circuit boards including light sensors, for detecting strikes of laser light, and a motor. When a strike of laser light is detected, power is provided to the motor, which vibrates and causes the apparatus to move.

Abstract: A target senses whether and where it has been struck by a laser light. The target includes a screen for allowing laser light to pass through, a plurality of light sensors behind the screen, and an optical display associated with one or more of the light sensors. When the target is struck by a laser light, a sensor records the strike, and the target may be struck with laser light multiple times, whereby different sensors may record the different strikes. To determine whether and where the target has been struck, the user activates a display mode that causes the optical displays in the target to illuminate. The user can then reset the target so the user can begin again.

Abstract: A grip for use on a firearm includes a base surface, portions that are raised above the base surface, and/or portions that are lower than the base surface. The grip may include raised portions and lowered portions that alternate vertically and/or horizontally on the grip. The raised portions may be 0.005? to 0.050? above the surface, and the lowered portions may be 0.005? to 0.050? lower than the surface. The grip may be formed of any suitable material, such as plastic or rubber, and made in any suitable manner, such as injection molding or vacuum molding. The raised portions and/or lowered portions may include one or more of designs, letters, and numbers.

Abstract: A laser targeting apparatus rests on a surface and moves, such as by vibrating, wobbling, or shaking, when struck by laser light of sufficient intensity. The apparatus is designed not to fall over, so a user does not have to move to the apparatus and pick it up after a strike. The apparatus has a body that includes a structure, which is preferably one or more printed circuit boards including light sensors, for detecting strikes of laser light, and a motor. When a strike of laser light is detected, power is provided to the motor, which vibrates and causes the apparatus to move.

Abstract: A laser targeting apparatus rests on a surface and moves, such as by vibrating, wobbling, or shaking, when struck by laser light of sufficient intensity. The apparatus is designed not to fall over, so a user does not have to move to the apparatus and pick it up after a strike. The apparatus has a body that includes a structure, which is preferably one or more printed circuit boards including light sensors, for detecting strikes of laser light, and a motor. When a strike of laser light is detected, power is provided to the motor, which vibrates and causes the apparatus to move.

Abstract: A gun sighting device includes a grip and is mounted to the side of the gun. The grip has a compressible touch pad that is positioned such that a user's fingers are adjacent to, or on, the compressible touch pad when the user's hand is in the natural position of supporting the gun. The compressible touch pad can be compressed by the user's fingers to activate a light source while the user is holding the gun in the firing position, and without the user having to move his/her hand from supporting the gun or from the gun trigger.

Abstract: A target senses whether and where it has been struck by a laser light. The target includes a screen for allowing laser light to pass through, a plurality of light sensors behind the screen, and an optical display associated with one or more of the light sensors. When the target is struck by a laser light, a sensor records the strike, and the target may be struck with laser light multiple times, whereby different sensors may record the different strikes. To determine whether and where the target has been struck, the user activates a display mode that causes the optical displays in the target to illuminate. The user can then reset the target so the user can begin again.

Abstract: A device incorporates a light source, a power source, and a control unit. The device has two operating modes and a switch to select one of the two modes. In a first operating mode the light source has a first control function wherein it emits light and a second control function wherein it does not emit light. In a second mode the light source emits light when the sound of a gun firing pin is detected.

Abstract: A sighting device replicates the spread pattern of pellets exiting the barrel of a shotgun. The sighting device includes a light source (preferably a laser) and a power source connectable to the light source. The device may also include a mount to attach the sighting device to a shotgun. The sighting device preferably projects a circular pattern of individual light beams wherein the circumference of the circular pattern increases as the light beams move farther from the sighting device to replicate the spread of shotgun pellets. The sighting device may also project a beam of light in the center of the pattern.

Abstract: An accessory is mountable to the side plate of a gun. The accessory may be a sighting device including a light source (preferably a laser), and a power source connectable to the light source. The side plate is positioned on the gun, which is preferably a revolver, preferably by being screwed to it. The side plate includes an attachment mechanism that is preferably located behind the trigger guard and behind the gun cylinder, wherein the accessory is attachable to the attachment mechanism.