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: 305 Class Title: WHEEL SUBSTITUTES FOR LAND VEHICLES Subclass Subclass Number Title 1 STEPPER TYPE 2 .Cam positioned 3 .Having plural link connector elements 4 .Feet attached to rim 5 ..Spring biased 6 RIGID PORTABLE TRACK 7 .Circular 8 WITH RAIL ENGAGING MEANS 9 WITH BRAKE 10 WITH HYDRAULIC ADJUSTING MEANS 11 WITH MEANS TO EXCLUDE OR REMOVE FOREIGN MATTER 12 .Deflector plate or scraper 13 .Self-cleaning tread unit structure 14 WITH LUBRICATING MEANS 15 COMBINED OR CONVERTIBLE 16 FRAME CARRIED TRACK 17 .With roller antifriction means 18 ..Track carried 19 SINGLE WHEEL TYPE 20 WHEEL ON TOP OF UPPER TRACK RUN 21 END WHEELS WITH INTERMEDIATE SUPPORT 22 .Support connected to end wheel for movement therewith to maintain track tension 23 .Intermediate support comprises wheel contacting upper and lower track runs 24 .Intermediate support engages lower track run 25 ..With intermediate upper track run support means 26 ..Support comprises endless roller chain 27 ..Support comprises vertically movable wheels 28 ..Support comprises plural wheels 29 RELATIVELY MOVABLE END WHEELS 30 .Vertically adjustable 31 .Longitudinally outwardly biased 32 .Longitudinally adjustable 33 WITH INTERPOSED FRICTION DRIVE BELT 34 INFLATABLE MEANS 35 R NON-METALLIC TYPE TRACK OR TREAD 36 .With metal sleeve for connector pin 37 .With connecting means for reinforcing elements 38 .With metallic embedded reinforcement 35 EB .Non-metallic ground engaging means includes endless belt 39 TRACKS OR TREADS 40 .Cable connected treads 41 .Resilient connection between treads 42 ..Torsion bushing 43 ..Resilient compressible hinge 44 .Steerable 45 .Adjustable connection between treads 46 .With resiliently biased ground engaging portion 47 .With sag prevention means 48 ..Projecting truss type 49 ...Truss interconnectedd 50 .Track treads interconnected without separate fastening means 51 .With street plate 52 .With roller means 53 .One piece track tread 54 .With detachable grouser 55 ..Interconnected without separate fastening means 56 .With means for interfitting with support 57 ..Sprocket and track engagement 58 R .Separate transverse pin connector between treads 59 ..Non-cylindrical or hollow connector pin 58 PC ..Pin connectors 60 MISCELLANEOUS * ****************************** * CROSS-REFERENCE ART COLLECTION * ****************************** 900 MASTER LINK