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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Class Number: 404 Class Title: ROAD STRUCTURE, PROCESS, OR APPARATUS Subclass Subclass Number Title 1 ROAD SYSTEM (E.G., ELEVATED, INTERCHANGE) 2 DRAIN OR GUTTER 3 .With conduit support means 4 .Street or curb inlet for surface drainage 5 ..Separately attached curb box 6 TRAFFIC STEERING DEVICE OR BARRIER 7 .Curb 8 ..With rim or edge protector 9 TRAFFIC DIRECTOR 10 .Yielding 11 ..Distinct biasing means recessed in roadway 12 .Attenuated lane marker type 13 ..Discrete interfitted element 14 ..Impregnated with reflective material 15 .Vibration inducing member (e.g., road stud, speed bump) 16 ..Including reflector 17 PAVEMENT 18 .Combined sheet and preformed module 19 .Anti-slip surface 20 ..Abrasive impregnated 21 ..Including metal 22 .Including light admitting means 23 ..With removable lens 24 ..Concrete frame 25 .Vault cover-closure 26 ..Elevation or level adjustment 27 .Including bed 28 ..Having preformed element layer 29 ...Blocks 30 ...Having irregular aggregate module 31 ..Plural layers 32 .Rubber or rubber-like 33 ..Integral key to base 34 .Modules or blocks (preformed) 35 ..Portable mat type 36 ...Foraminous traffic surface 37 ..Including spacer means 38 ...Integral 39 ....Bevel or incline edge 40 ..With separate interlocking member 41 ..Interfitting 42 ..Patterned 43 ..Supported by footing or beam 44 ..Composite or compound 45 ..Reinforced 46 ..Wood 47 .Including joint means 48 ..With transitory core, cap, screed, or installation means (e.g., forms) 49 ..With internal cavity for deformable filler 50 ..With offset or keyed slab ends 51 ...Plus bridge or dowel meanss 52 ..With articulated dowel means 53 ..With underlying bridge for adjacent slab ends 54 ...And overlying bridge means 55 ...Janus-faced angle member 56 ..With mid-slab bridge means 57 ...Sliding plate pair 58 ....Horizontal slide plane 59 ...End cushioned or lubricated dowel 60 ...Sleeved or telescoped at joint 61 ...Cantilevered dowel or only filler support 62 ...Supported dowel end 63 ....And supported dowel end 64 ..Preformed non-metallic only 65 ...Externally profiled 66 ...Encased, laminated or composite 67 ..Compound or composite 68 ..Strip or filler plus supporting bracket 69 ..Sealing cap or filler support 70 .Reinforced structure 71 MISCELLANEOUS ROAD STRUCTURE (E.G., HEATED PAVEMENT) 72 PROCESS 73 .Handling or treating preformed modular unit 74 .Providing expansion joint 75 .In situ treatment of earth or roadway 76 ..Dust fixation or soil stabilization 77 ..Heating 78 ..Raising sunken pavement 79 .Heating 80 ..Including separate handling of different sized aggregate 81 .Separate handling of different sized aggregate 82 .Sequential construction of diverse layers 83 APPARATUS 84.05 .Automatic control 84.1 ..Of material leveling means 84.2 ...Adjusted to a predetermined path 84.5 ...Adjusted to an acoustical or optical signal 84.8 ...Specific to a sloped or curved application 85 .With means for alternative ground support by tool or transport means 86 ..Tool attachment type 87 .Means to install or form joint 88 ..And means to hold or position dowel 89 ..Means to form groove in plastic or uncured roadway 90 .With means for comminuting of road in situ 91 ..Including removal and redepositing means 92 .With means for in situ material preparation, e.g., mixing 93 .With surface marking (or grooving) 94 ..Applied to existing hard surface 95 .With means for heating a road base, surface, or material 96 .With means for profile shaping, e.g., crown 97 ..Manually propelled 98 ..Curb or gutter 99 .Block laying 100 .Reinforcement material placing, laying or positioning 101 .Material distribution means 102 ..Including dynamic means to densify material 103 ...Leveling or smoothing roller 104 ..Shoulder paving or surface wideningg 105 ..With material supply to self-contained side forms, e.g., slip-forms 106 ..With material supply to unit-supporting rail type side forms 107 ..Joint or crack filling 108 ..Including material supply 109 ...Boom and bucket type 110 ...Portable spreader box 111 ...Liquid supply 112 .Tool rotating in horizontal plane 113 .Means to agitate material 114 ..Mounted on screed 115 ..Material immersed agitating means 116 ...Individual element, vertically oriented 117 ..Compacting roller with vibrating means 118 .Screed or drag 119 ..Supported on rail type side forms 120 ..Reciprocating 121 .Sheep foot roller 122 .Rotating drum, roller or tire 123 ..Three tandem rollers 124 ..Roller periphery characteristics 125 ..Plural roll axes angularly shiftable 126 ..Plural roll axes relatively shiftable 127 ..Specific to slope, trench or shoulder application 128 ..Attachment or combined 129 ..With means to lubricate, scrape or clean roller surface 130 ..Shiftable or variable ballast 131 ..Manually propelled, e.g., lawn roller 132 ..Plural rolls with common axes 133.05 .Tamper 133.1 ..Manually guided 133.2 ..Attached to a disparate device 134 REINFORCEMENT STRUCTURE PER SE 135 .With road chair 136 ROAD CHAIR PER SE