US Patent Class 305
WHEEL SUBSTITUTES FOR LAND VEHICLES-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1  DF  STEPPER TYPE {3}
6  DF  RIGID PORTABLE TRACK {1}
8  DF  WITH RAIL ENGAGING MEANS
9  DF  WITH BRAKE
100  DF  WITH MEANS TO REMOVE OR EXCLUDE FOREIGN MATTER (E.G., SEAL, SCRAPER) {8}
116  DF  TRACK GUIDE OR ALIGNMENT MECHANISM
117  DF  WITH LUBRICATION {2}
15  DF  COMBINED OR CONVERTIBLE
120  DF  WITH FRAME CARRIED ENDLESS TRACK {1}
19  DF  SINGLE WHEEL TYPE
20  DF  WHEEL ON TOP OF UPPER TRACK RUN
124  DF  WITH TRACK SUPPORT INTERMEDIATE OF END WHEELS {4}
143  DF  WITH MEANS FOR TENSIONING TRACK BY MOVING AT LEAST ONE ENDWHEEL {7}
33  DF  WITH INTERPOSED FRICTION DRIVE BELT
34  DF  INFLATABLE MEANS
157  DF  ENDLESS BELT HAVING NONMETALLIC TRACK OR TREAD {5}
185  DF  TRACKS OR TREADS {14}
60  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTION
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900  DF  MASTER LINK