What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 191 Class Title: ELECTRICITY: TRANSMISSION TO VEHICLES Subclass Subclass Number Title 1 R MISCELLANEOUS 1 A .Electroplating contact rolls 2 SYSTEMS OF DISTRIBUTION 3 .Convertible, multiple current source 4 ..Internal and external 5 ..Alternating direct 6 .Sectional 7 .Alternating-alternating 8 .Safety cut-out 9 DRAWBRIDGE AND TRANSFER TABLE 10 MAGNETIC INDUCTION 11 VEHICLE IN SERIES 12 R FLEXIBLE EXTENSIONS 12.2 R .Reels 12.4 ..With connector plug or receptacle 12.2 A ..Motor-operated 12 S .Electric iron stands 12 C .Chain protectors 13 PLATE CONDUCTOR 14 SECTIONAL CONDUCTOR 15 .Normally live section .Normally dead section 16 ..Magnetomechanical circuit controller 17 ..Magnetic circuit controller 18 ...Magnet on vehicle 19 ....Traveling controller 20 ..Mechanical circuit controller 21 ...Deformable conductor 22 R CONDUCTORS 23 R .Conduit 24 ..Asymmetric 25 ..Closing 26 ..Draining 27 ..Heated 28 ..Special modifications 23 A ..Overhead conduit conductors 29 R .Third rail 30 ..Protected 31 ...Closing 32 ..Supports 29 DM ..Conductor made from different materials 33 R .Trolley 34 ..Nonunderrunning 35 ..Guarded 36 ..Special intersections 37 ..Crossings 38 ..Switches 39 ..Section insulators 40 ..Supports 41 ...Catenary 42 ...Combined ears and insulator 43 ...Earss 44 ....Splices 44.1 ..Splicers 33 PM ..Cables made of multiple material 22 C .At or below ground surface 22 DM .Rail, made of multiple materials 45 R COLLECTORS 46 .Convertible 47 .Bar 48 .Conduit plow 49 .Third-rail shoe 50 .Trolley 51 ..Common wire passing 52 ..Detachable 53 ..Nonunderrunning 54 ..Indefinite path 55 ...Bow 56 ...Roller 57 ..Multiple contact 58 ...Tandem 59 ..Heads 59.1 ...Sliding contact 60 ...Swivel 60.1 ....Center bias 60.2 ...Lateral swing 60.3 ...Vertical swing 60.4 ...Axial slide 60.5 ...Pole couplings 61 ...Wheel to head contactor 62 ...Ice clearers or preventers 63 ...Wheels 63.1 ....Quick release 63.2 ....Lateral slide 63.3 ....Universal mount 63.4 ....Slidable pins 63.5 ....Pin fasteners 64 ..Poles 65 ...Frames 66 ..Stands 67 ...Fluid pressure erector 68 ...Spring erector 69 ....Torsion 70 ....Tension or compression 71 ..Rope protectors 72 ..Guards and finders 73 ...Constantly operative 74 ....Fixed 75 ....Spiral cam replacer 76 ....Star wheel 77 ...Normally operative 78 ....Automatic 79 ....Rope-retracted 80 .....Lateral swing 81 .....Longitudinal swing 82 ...Normally inoperative 83 ....Automatic 84 ....Rope-actuated 85 .Trolley retrievers 86 ..Erector releasee 87 ...Fluid pressure erector 88 ...Spring erector 89 ....Toggle 90 ..Fluid pressure-retracted 91 ..Spring-retracted 92 ...Rope-actuated 93 ....Slack take-up 94 ..Weight-retracted 95 .Nonretracting trolley stops 45 A .Suspended conveyors