| 1.01 | INDICATORS
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| 1.02 | . Magazine shot
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| 1.03 | . Single shot, e.g., digital type
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| 1.04 | . Hammer position
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| 1.05 | . Chamber status
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| 1.06 | WITH RECOIL REDUCER
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| 1.07 | WITH ADJUSTABLE HEAD SPACE
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| 1.071 | . By reaming
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| 1.08 | FOR DISCHARGING A STUNNING AGENT
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| 1.09 | DISGUISED AS BODY ARTICLE
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| 1.11 | BODY BORNE REMOTE OPERATED
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| 1.12 | CATTLE SLAUGHTER TYPE
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| 1.13 | TRIP, TRAP OR BURGLARY PREVENTION
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| 1.14 | UNDERWATER TYPE
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| 1.15 | FLARE TYPE GUN
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| 1.16 | BILLY CLUB TYPE
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| 52 | CANE GUNS
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| 53 | PISTOL SWORDS
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| 54 | TOY
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| 57 | . Ribbon fed
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| 58 | . Revolvers
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| 55 | . Cannon
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| 2 | BREECH LOADING
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| 5 | . Spring-motor operated
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| 8 | . Breech hinged barrel
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| 9 | . Faucet breechblock
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| 10 | . Forward-sliding barrel
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| 11 | .. Magazine
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| 12 | . Side swinging barrel
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| 13 | .. Parallel pivot
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| 14 | . Sliding breechblock
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| 15 | .. Movable chamber
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| 16 | .. Rearward
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| 17 | ... Magazine
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| 18 | .... Box
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| 19 | .... Rotary
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| 20 | ... Pivoted hammer
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| 21 | .... Magazine
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| 22 | ..... Box
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| 25 | ... Extractors
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| 16.1 | ... Method of making
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| 23 | .. Vertical mortise
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| 24 | ... Magazine
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| 26 | . Swinging breechblock
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| 27 | .. Movable chamber
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| 28 | .. Downward and rearward
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| 29 | ... Magazine
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| 30 | .. Laterally forward
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| 31 | .. Laterally rearward
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| 32 | .. Parallel pivot
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| 33 | ... Magazine
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| 34 | .. Rearward and downward
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| 35 | ... Magazine
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| 36 | .. Upward and forward
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| 37 | ... Magazine
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| 38 | .. Upward and rearward
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| 39 | ... Magazine
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| 39.5 | . Movable chamber
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| 40 | . Upward-tilting breech
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| 41 | .. Firing mechanism
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| 42.01 | ... With single actuator
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| 42.02 | .... Plural triggers
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| 42.03 | .... Single trigger and hammer
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| 43 | ... Cocking devices
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| 44 | .. Barrel locks
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| 45 | ... Hammer cocking
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| 46 | .. Extractors
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| 47 | .. Ejectors
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| 48 | ... Hammer
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| 7 | . Grip magazine pistols
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| 6 | . Magazine guns
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| 49.01 | . Magazines
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| 49.02 | .. Adapters or capacity reducers
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| 50 | .. Box
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| 49.1 | .. Method of making
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| 51 | MUZZLE LOADERS
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| 59 | REVOLVERS
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| 60 | . Magazine-fed cylinder
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| 61 | . Cylinder loaded from muzzle end
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| 62 | . Swinging cylinder
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| 63 | . Hinged barrel
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| 64 | .. Barrel catches
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| 65 | . Firing mechanism
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| 66 | .. Safety devices
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| 67 | .. Cylinder stops
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| 68 | . Shell extractors
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| 69.01 | FIRING MECHANISM
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| 69.02 | . Rearward sliding breech bolt
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| 69.03 | .. With pivoted hammer
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| 70.01 | SAFETY MECHANISM
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| 70.02 | . Magazine operated
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| 70.03 | . Shoulder operated
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| 70.04 | . Sear trigger lock
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| 70.05 | . Sear lock
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| 70.06 | . Trigger lock
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| 70.07 | . On trigger guard
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| 70.08 | . Hammer or firing pin
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| 70.09 | . Responsive to particular firing angle
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| 70.11 | . Firearm lock
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| 71.01 | STOCKS
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| 71.02 | . For pistols
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| 72 | . Auxiliary
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| 73 | . Adjustable
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| 74 | . Cushioned
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| 75.01 | STOCK OR BARREL CONNECTORS
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| 75.02 | . Barrel to receiver
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| 75.03 | . Receiver to stock
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| 75.04 | . Hinged or pivoted barrel
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| 75.1 | . Method of making
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| 76.01 | BARRELS
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| 76.02 | . Materials or coatings
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| 77 | . Auxiliary
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| 78 | . Rifling or lining
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| 79 | . Choke devices
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| 76.1 | . Method of making or modifying by metal working
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| 83 | NIPPLES AND GUARDS
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| 84 | ELECTRIC APPLIANCES
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| 85 | GUN TRIMMINGS
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| 86 | BAYONETS
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| 87 | MAGAZINE CHARGERS
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| 88 | . Packs
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| 89 | .. Revolver
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| 90 | IMPLEMENTS
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| 93 | . Intrenching
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| 94 | . Rests
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| 95 | . For barrel cleaning
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| 96 | . Firearm protectors
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| 97 | . Weights and balances
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| 98 | . Shell catchers
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| 99 | . Magnetic holding devices
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| 111 | . Sight devices
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| 112 | .. Vent, vented, or ventilated rib type
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| 113 | .. Target spot or dot superimposed on sight
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| 114 | .. Focused beam (e.g., laser on target, etc.)
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| 115 | ... Having beam adjusting structure or mounted for correction
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| 116 | ... Through the bore type (i.e., insertable into firing chamber)
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| 117 | ... Activated by a switch
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| 118 | .. Periscope type or using a mirror
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| 119 | .. Telescopic type
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| 120 | ... With a collimating or sighting-in device
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| 121 | .... Insertable into muzzle
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| 122 | ... Having a reticle (including adjustable)
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| 123 | .... And an illuminating or incandescent device
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| 124 | ... Mount or mounting
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| 125 | .... Allowing adjustment
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| 126 | ..... Vertically and laterally
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| 127 | .... Quickly detachable (i.e., knockdown)
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| 128 | .... To nonuse position, including to reload
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| 129 | ... Lens cover, scope hood, or shade
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| 130 | .. With a reticle or graticule (e.g., crosshairs, etc.)
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| 131 | ... Including an incandescent or illuminating device
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| 132 | .. Illuminated, including fiber optics
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| 133 | .. Having variable size aperture, slot, notch, or cone-shaped
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| 134 | .. Through the bore type (e.g., sighting in, or straightness testing device, etc.)
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| 135 | .. Correctable
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| 136 | ... Vertically adjustable (e.g., slide, ramp, etc.)
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| 137 | .... And laterally
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| 138 | .... By pivoting about transverse axis
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| 139 | ... Laterally, including target leading type
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| 140 | .. Dual flip-, superimposed-, or dial-type
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| 141 | .. Multisight, for moving targets (e.g., shotgun type, etc.)
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| 142 | .. Nonadjustable rangefinder, type
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| 143 | .. Hood, guard, shade, or cover
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| 144 | .. Using contrasting material or color (e.g., bead, etc.)
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| 145 | ... Luminescent, phosphorescent, luminous material
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| 146 | .. Target illuminated (e.g., via flashlight, etc.)
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| 147 | .. Yieldable
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| 148 | .. Stowed, relocated to nonuse position, or quickly detachable
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| 104 | . Finger recoil pad
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| 105 | . For launching grenades
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| 107 | MUZZLE MAKING, ATTACHING OR REPAIR
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| 108 | TOOL FOR ASSEMBLY OR DISASSEMBLY
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| 106 | MISCELLANEOUS
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| FOREIGN ART COLLECTIONS
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| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS
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| DIGESTS |
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| DIG1 | RELEASE TRIGGER
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