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Class Information
Number: 42
Name: Firearms >
Description: This class includes all the portable firearms, i.e., those which are supported by hand when operated, such as shoulder guns, pistols, toy firearms and cane guns, except the automatic or explosion-operated firearms. This class also has such firearms combined with cleaners, intrenching devices, bayonets, and other cutters (including specifically pistol-swords). The following devices are likewise found here either, per se, or in combination with the firearm; ram rods, gun-rests and some body supported arm rests.

Class Number	Class Name	No. of Patents
42/76.01	Barrels	112
42/77	Auxiliary	120
42/79	Choke devices	47
42/76.02	Materials or coatings	65
42/76.1	Method of making or modifying by metal working	16
42/78	Rifling or lining	60
42/86	Bayonets	14
42/1.16	Billy club type	14
42/1.11	Body borne remote operated	8
42/2	Breech loading	13
42/8	Breech hinged barrel	10
42/9	Faucet breechblock	8
42/10	Forward-sliding barrel	16
42/11	Magazine	13
42/7	Grip magazine pistols	114
42/6	Magazine guns	27
42/49.01	Magazines	58
42/49.02	Adapters or capacity reducers	36
42/50	Box	188
42/49.1	Method of making	2
42/39.5	Movable chamber	27
42/12	Side swinging barrel	9
42/13	Parallel pivot	6
42/14	Sliding breechblock	13
42/15	Movable chamber	23
42/16	Rearward	134
42/25	Extractors	113
42/17	Magazine	49
42/18	Box	52
42/19	Rotary	14
42/16.1	Method of making	2
42/20	Pivoted hammer	8
42/21	Magazine	10
42/22	Box	15
42/23	Vertical mortise	20
42/24	Magazine	2
42/5	Spring-motor operated	0
42/26	Swinging breechblock	4
42/28	Downward and rearward	4
42/29	Magazine	4
42/30	Laterally forward	1
42/31	Laterally rearward	0
42/27	Movable chamber	4
42/32	Parallel pivot	4
42/33	Magazine	4
42/34	Rearward and downward	8
42/35	Magazine	4
42/36	Upward and forward	1
42/37	Magazine	2
42/38	Upward and rearward	8
42/39	Magazine	3
42/40	Upward-tilting breech	23
42/44	Barrel locks	35
42/45	Hammer cocking	11
42/47	Ejectors	19
42/48	Hammer	5
42/46	Extractors	24
42/41	Firing mechanism	23
42/43	Cocking devices	14
42/42.01	With single actuator	36
42/42.02	Plural triggers	6
42/42.03	Single trigger and hammer	16
42/52	Cane guns	1
42/1.12	Cattle slaughter type	11
42/1.09	Disguised as body article	25
42/84	Electric appliances	155
42/69.01	Firing mechanism	202
42/69.02	Rearward sliding breech bolt	104
42/69.03	With pivoted hammer	116
42/1.15	Flare type gun	22
42/1.08	For discharging a stunning agent	79
42/85	Gun trimmings	77
42/90	Implements	289
42/104	Finger recoil pad	4
42/96	Firearm protectors	91
42/95	For barrel cleaning	108
42/105	For launching grenades	93
42/93	Intrenching	4
42/99	Magnetic holding devices	16
42/94	Rests	315
42/98	Shell catchers	45
42/111	Sight devices	97
42/135	Correctable	19
42/139	Laterally, including target leading type	9
42/136	Vertically adjustable (e.g., slide, ramp, etc.)	42
42/137	And laterally	62
42/138	By pivoting about transverse axis	23
42/140	Dual flip-, superimposed-, or dial-type	21
42/114	Focused beam (e.g., laser on target, etc.)	104
42/117	Activated by a switch	62
42/115	Having beam adjusting structure or mounted for correction	56
42/116	Through the bore type (i.e., insertable into firing chamber)	36
42/133	Having variable size aperture, slot, notch, or cone-shaped	20
42/143	Hood, guard, shade, or cover	18
42/132	Illuminated, including fiber optics	106
42/141	Multisight, for moving targets (e.g., shotgun type, etc.)	21
42/142	Nonadjustable rangefinder, type	18
42/118	Periscope type or using a mirror	20
42/148	Stowed, relocated to nonuse position, or quickly detachable	53
42/146	Target illuminated (e.g., via flashlight, etc.)	77
42/113	Target spot or dot superimposed on sight	60
42/119	Telescopic type	76
42/122	Having a reticle (including adjustable)	104
42/123	And an illuminating or incandescent device	49
42/129	Lens cover, scope hood, or shade	31
42/124	Mount or mounting	128
42/125	Allowing adjustment	56
42/126	Vertically and laterally	48
42/127	Quickly detachable (i.e., knockdown)	88
42/128	To nonuse position, including to reload	11
42/120	With a collimating or sighting-in device	28
42/121	Insertable into muzzle	19
42/134	Through the bore type (e.g., sighting in, or straightness testing device, etc.)	14
42/144	Using contrasting material or color (e.g., bead, etc.)	34
42/145	Luminescent, phosphorescent, luminous material	38
42/112	Vent, vented, or ventilated rib type	36
42/130	With a reticle or graticule (e.g., crosshairs, etc.)	44
42/131	Including an incandescent or illuminating device	40
42/147	Yieldable	6
42/97	Weights and balances	26
42/1.01	Indicators	86
42/1.05	Chamber status	33
42/1.04	Hammer position	3
42/1.02	Magazine shot	34
42/1.03	Single shot, e.g., digital type	11
42/87	Magazine chargers	85
42/88	Packs	17
42/89	Revolver	46
42/106	Miscellaneous	136
42/51	Muzzle loaders	125
42/107	Muzzle making, attaching or repair	3
42/83	Nipples and guards	35
42/53	Pistol swords	2
42/DIG.1	Release trigger	6
42/59	Revolvers	73
42/61	Cylinder loaded from muzzle end	7
42/65	Firing mechanism	74
42/67	Cylinder stops	21
42/66	Safety devices	97
42/63	Hinged barrel	5
42/64	Barrel catches	5
42/60	Magazine-fed cylinder	9
42/68	Shell extractors	19
42/62	Swinging cylinder	12
42/70.01	Safety mechanism	210
42/70.11	Firearm lock	440
42/70.08	Hammer or firing pin	232
42/70.02	Magazine operated	46
42/70.07	On trigger guard	147
42/70.09	Responsive to particular firing angle	8
42/70.05	Sear lock	45
42/70.04	Sear trigger lock	32
42/70.03	Shoulder operated	3
42/70.06	Trigger lock	151
42/75.01	Stock or barrel connectors	72
42/75.02	Barrel to receiver	134
42/75.04	Hinged or pivoted barrel	33
42/75.1	Method of making	7
42/75.03	Receiver to stock	76
42/71.01	Stocks	150
42/73	Adjustable	83
42/72	Auxiliary	119
42/74	Cushioned	103
42/71.02	For pistols	131
42/108	Tool for assembly or disassembly	14
42/54	Toy	32
42/55	Cannon	12
42/58	Revolvers	10
42/57	Ribbon fed	7
42/1.13	Trip, trap or burglary prevention	9
42/1.14	Underwater type	32
42/1.07	With adjustable head space	13
42/1.071	By reaming	1
42/1.06	With recoil reducer	65