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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	107
42/77	Auxiliary	114
42/79	Choke devices	45
42/76.02	Materials or coatings	65
42/76.1	Method of making or modifying by metal working	15
42/78	Rifling or lining	60
42/86	Bayonets	14
42/1.16	Billy club type	13
42/1.11	Body borne remote operated	8
42/2	Breech loading	11
42/8	Breech hinged barrel	10
42/9	Faucet breechblock	8
42/10	Forward-sliding barrel	14
42/11	Magazine	12
42/7	Grip magazine pistols	110
42/6	Magazine guns	27
42/49.01	Magazines	50
42/49.02	Adapters or capacity reducers	34
42/50	Box	176
42/49.1	Method of making	1
42/39.5	Movable chamber	26
42/12	Side swinging barrel	7
42/13	Parallel pivot	5
42/14	Sliding breechblock	10
42/15	Movable chamber	22
42/16	Rearward	130
42/25	Extractors	107
42/17	Magazine	48
42/18	Box	48
42/19	Rotary	12
42/16.1	Method of making	2
42/20	Pivoted hammer	7
42/21	Magazine	10
42/22	Box	15
42/23	Vertical mortise	19
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	21
42/41	Firing mechanism	22
42/43	Cocking devices	12
42/42.01	With single actuator	36
42/42.02	Plural triggers	5
42/42.03	Single trigger and hammer	15
42/52	Cane guns	0
42/1.12	Cattle slaughter type	11
42/1.09	Disguised as body article	24
42/84	Electric appliances	147
42/69.01	Firing mechanism	188
42/69.02	Rearward sliding breech bolt	100
42/69.03	With pivoted hammer	110
42/1.15	Flare type gun	22
42/1.08	For discharging a stunning agent	70
42/85	Gun trimmings	70
42/90	Implements	273
42/104	Finger recoil pad	4
42/96	Firearm protectors	86
42/95	For barrel cleaning	104
42/105	For launching grenades	87
42/93	Intrenching	3
42/99	Magnetic holding devices	16
42/94	Rests	280
42/98	Shell catchers	40
42/111	Sight devices	86
42/135	Correctable	15
42/139	Laterally, including target leading type	9
42/136	Vertically adjustable (e.g., slide, ramp, etc.)	38
42/137	And laterally	60
42/138	By pivoting about transverse axis	21
42/140	Dual flip-, superimposed-, or dial-type	21
42/114	Focused beam (e.g., laser on target, etc.)	97
42/117	Activated by a switch	58
42/115	Having beam adjusting structure or mounted for correction	54
42/116	Through the bore type (i.e., insertable into firing chamber)	35
42/133	Having variable size aperture, slot, notch, or cone-shaped	19
42/143	Hood, guard, shade, or cover	18
42/132	Illuminated, including fiber optics	97
42/141	Multisight, for moving targets (e.g., shotgun type, etc.)	21
42/142	Nonadjustable rangefinder, type	15
42/118	Periscope type or using a mirror	18
42/148	Stowed, relocated to nonuse position, or quickly detachable	48
42/146	Target illuminated (e.g., via flashlight, etc.)	66
42/113	Target spot or dot superimposed on sight	59
42/119	Telescopic type	65
42/122	Having a reticle (including adjustable)	89
42/123	And an illuminating or incandescent device	44
42/129	Lens cover, scope hood, or shade	30
42/124	Mount or mounting	116
42/125	Allowing adjustment	50
42/126	Vertically and laterally	44
42/127	Quickly detachable (i.e., knockdown)	78
42/128	To nonuse position, including to reload	11
42/120	With a collimating or sighting-in device	26
42/121	Insertable into muzzle	17
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.)	33
42/145	Luminescent, phosphorescent, luminous material	36
42/112	Vent, vented, or ventilated rib type	35
42/130	With a reticle or graticule (e.g., crosshairs, etc.)	41
42/131	Including an incandescent or illuminating device	37
42/147	Yieldable	5
42/97	Weights and balances	25
42/1.01	Indicators	81
42/1.05	Chamber status	30
42/1.04	Hammer position	3
42/1.02	Magazine shot	31
42/1.03	Single shot, e.g., digital type	10
42/87	Magazine chargers	80
42/88	Packs	16
42/89	Revolver	46
42/106	Miscellaneous	129
42/51	Muzzle loaders	120
42/107	Muzzle making, attaching or repair	3
42/83	Nipples and guards	34
42/53	Pistol swords	2
42/DIG.1	Release trigger	6
42/59	Revolvers	71
42/61	Cylinder loaded from muzzle end	7
42/65	Firing mechanism	72
42/67	Cylinder stops	20
42/66	Safety devices	94
42/63	Hinged barrel	5
42/64	Barrel catches	5
42/60	Magazine-fed cylinder	9
42/68	Shell extractors	18
42/62	Swinging cylinder	11
42/70.01	Safety mechanism	196
42/70.11	Firearm lock	429
42/70.08	Hammer or firing pin	227
42/70.02	Magazine operated	41
42/70.07	On trigger guard	143
42/70.09	Responsive to particular firing angle	8
42/70.05	Sear lock	43
42/70.04	Sear trigger lock	32
42/70.03	Shoulder operated	3
42/70.06	Trigger lock	146
42/75.01	Stock or barrel connectors	67
42/75.02	Barrel to receiver	130
42/75.04	Hinged or pivoted barrel	32
42/75.1	Method of making	7
42/75.03	Receiver to stock	76
42/71.01	Stocks	134
42/73	Adjustable	76
42/72	Auxiliary	101
42/74	Cushioned	93
42/71.02	For pistols	125
42/108	Tool for assembly or disassembly	12
42/54	Toy	32
42/55	Cannon	11
42/58	Revolvers	10
42/57	Ribbon fed	7
42/1.13	Trip, trap or burglary prevention	9
42/1.14	Underwater type	31
42/1.07	With adjustable head space	13
42/1.071	By reaming	1
42/1.06	With recoil reducer	57