| 305 / | HD | WHEEL SUBSTITUTES FOR LAND VEHICLES |
|
| 157 | DF | ENDLESS BELT HAVING NONMETALLIC TRACK OR TREAD {5} |
| 165 | DF | .~ Track formed of endless flexible belt {6} |
| 167 | DF | .~.~ With metallic embedded reinforcement {4} |
| 170 | DF | .~.~.~ Reinforcement is endless {2} |
| 171 | DF | .~.~.~.~ Including core bar reinforcement {2} |
| 173 | DF | .~.~.~.~.~ Including sprocket wheel or roller guide lug or projection {1} |
| 174 | DF | .~.~.~.~.~.~ Plural lugs or projections {1} |
| 175 |  | .~.~.~.~.~.~.~ Including additional reinforcement for sprocket wheel |