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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	139
42/77	Auxiliary	135
42/79	Choke devices	59
42/76.02	Materials or coatings	83
42/76.1	Method of making or modifying by metal working	28
42/78	Rifling or lining	69
42/86	Bayonets	16
42/1.16	Billy club type	14
42/1.11	Body borne remote operated	10
42/2	Breech loading	20
42/8	Breech hinged barrel	13
42/9	Faucet breechblock	8
42/10	Forward-sliding barrel	16
42/11	Magazine	14
42/7	Grip magazine pistols	135
42/6	Magazine guns	42
42/49.01	Magazines	89
42/49.02	Adapters or capacity reducers	48
42/50	Box	217
42/49.1	Method of making	3
42/39.5	Movable chamber	28
42/12	Side swinging barrel	9
42/13	Parallel pivot	6
42/14	Sliding breechblock	26
42/15	Movable chamber	25
42/16	Rearward	166
42/25	Extractors	119
42/17	Magazine	58
42/18	Box	56
42/19	Rotary	18
42/16.1	Method of making	2
42/20	Pivoted hammer	10
42/21	Magazine	10
42/22	Box	16
42/23	Vertical mortise	20
42/24	Magazine	2
42/5	Spring-motor operated	0
42/26	Swinging breechblock	6
42/28	Downward and rearward	6
42/29	Magazine	5
42/30	Laterally forward	1
42/31	Laterally rearward	1
42/27	Movable chamber	4
42/32	Parallel pivot	4
42/33	Magazine	4
42/34	Rearward and downward	10
42/35	Magazine	5
42/36	Upward and forward	2
42/37	Magazine	2
42/38	Upward and rearward	9
42/39	Magazine	3
42/40	Upward-tilting breech	27
42/44	Barrel locks	37
42/45	Hammer cocking	11
42/47	Ejectors	22
42/48	Hammer	5
42/46	Extractors	30
42/41	Firing mechanism	24
42/43	Cocking devices	16
42/42.01	With single actuator	36
42/42.02	Plural triggers	8
42/42.03	Single trigger and hammer	17
42/52	Cane guns	1
42/1.12	Cattle slaughter type	11
42/1.09	Disguised as body article	27
42/84	Electric appliances	207
42/69.01	Firing mechanism	235
42/69.02	Rearward sliding breech bolt	136
42/69.03	With pivoted hammer	131
42/1.15	Flare type gun	23
42/1.08	For discharging a stunning agent	112
42/85	Gun trimmings	118
42/90	Implements	383
42/104	Finger recoil pad	4
42/96	Firearm protectors	111
42/95	For barrel cleaning	130
42/105	For launching grenades	109
42/93	Intrenching	4
42/99	Magnetic holding devices	17
42/94	Rests	420
42/98	Shell catchers	48
42/111	Sight devices	153
42/135	Correctable	24
42/139	Laterally, including target leading type	10
42/136	Vertically adjustable (e.g., slide, ramp, etc.)	46
42/137	And laterally	69
42/138	By pivoting about transverse axis	28
42/140	Dual flip-, superimposed-, or dial-type	29
42/114	Focused beam (e.g., laser on target, etc.)	144
42/117	Activated by a switch	82
42/115	Having beam adjusting structure or mounted for correction	76
42/116	Through the bore type (i.e., insertable into firing chamber)	43
42/133	Having variable size aperture, slot, notch, or cone-shaped	27
42/143	Hood, guard, shade, or cover	23
42/132	Illuminated, including fiber optics	133
42/141	Multisight, for moving targets (e.g., shotgun type, etc.)	27
42/142	Nonadjustable rangefinder, type	36
42/118	Periscope type or using a mirror	26
42/148	Stowed, relocated to nonuse position, or quickly detachable	65
42/146	Target illuminated (e.g., via flashlight, etc.)	116
42/113	Target spot or dot superimposed on sight	78
42/119	Telescopic type	106
42/122	Having a reticle (including adjustable)	150
42/123	And an illuminating or incandescent device	63
42/129	Lens cover, scope hood, or shade	43
42/124	Mount or mounting	201
42/125	Allowing adjustment	95
42/126	Vertically and laterally	65
42/127	Quickly detachable (i.e., knockdown)	125
42/128	To nonuse position, including to reload	20
42/120	With a collimating or sighting-in device	33
42/121	Insertable into muzzle	23
42/134	Through the bore type (e.g., sighting in, or straightness testing device, etc.)	18
42/144	Using contrasting material or color (e.g., bead, etc.)	41
42/145	Luminescent, phosphorescent, luminous material	45
42/112	Vent, vented, or ventilated rib type	41
42/130	With a reticle or graticule (e.g., crosshairs, etc.)	65
42/131	Including an incandescent or illuminating device	57
42/147	Yieldable	8
42/97	Weights and balances	34
42/1.01	Indicators	104
42/1.05	Chamber status	41
42/1.04	Hammer position	5
42/1.02	Magazine shot	44
42/1.03	Single shot, e.g., digital type	19
42/87	Magazine chargers	95
42/88	Packs	21
42/89	Revolver	49
42/106	Miscellaneous	163
42/51	Muzzle loaders	144
42/107	Muzzle making, attaching or repair	5
42/83	Nipples and guards	38
42/53	Pistol swords	2
42/DIG.1	Release trigger	6
42/59	Revolvers	76
42/61	Cylinder loaded from muzzle end	9
42/65	Firing mechanism	77
42/67	Cylinder stops	23
42/66	Safety devices	99
42/63	Hinged barrel	5
42/64	Barrel catches	6
42/60	Magazine-fed cylinder	10
42/68	Shell extractors	19
42/62	Swinging cylinder	19
42/70.01	Safety mechanism	258
42/70.11	Firearm lock	474
42/70.08	Hammer or firing pin	257
42/70.02	Magazine operated	56
42/70.07	On trigger guard	154
42/70.09	Responsive to particular firing angle	8
42/70.05	Sear lock	55
42/70.04	Sear trigger lock	39
42/70.03	Shoulder operated	3
42/70.06	Trigger lock	164
42/75.01	Stock or barrel connectors	108
42/75.02	Barrel to receiver	178
42/75.04	Hinged or pivoted barrel	38
42/75.1	Method of making	18
42/75.03	Receiver to stock	129
42/71.01	Stocks	249
42/73	Adjustable	130
42/72	Auxiliary	203
42/74	Cushioned	130
42/71.02	For pistols	144
42/108	Tool for assembly or disassembly	26
42/54	Toy	44
42/55	Cannon	12
42/58	Revolvers	12
42/57	Ribbon fed	9
42/1.13	Trip, trap or burglary prevention	9
42/1.14	Underwater type	40
42/1.07	With adjustable head space	13
42/1.071	By reaming	1
42/1.06	With recoil reducer	97