子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 221 | Tractor-wheel fluke | US36676220 | 1920-03-18 | US1458937A | 1923-06-19 | HART CHARLES W |
| 222 | Grouser | US56297422 | 1922-05-23 | US1453872A | 1923-05-01 | HAWKINS ROE C; HIXSON ERNEST S |
| 223 | Traction wheel with movable blades | US45711421 | 1921-03-30 | US1450656A | 1923-04-03 | FRANCOIS TRECHOT |
| 224 | Traction lug | US46494621 | 1921-04-27 | US1436229A | 1922-11-21 | BENTZ JOHN A |
| 225 | Antiskid device for motor vehicles | US45701721 | 1921-03-30 | US1432971A | 1922-10-24 | DAVIES SEPTIMUS H |
| 226 | Drive wheel for tractors | US48853721 | 1921-07-30 | US1431362A | 1922-10-10 | JAY BOLINSKI HERMAN |
| 227 | Traction wheel | US32187618 | 1918-09-05 | US1425258A | 1922-08-08 | HOKE JOHN I |
| 228 | Antiskid device | US49915321 | 1921-09-08 | US1410690A | 1922-03-28 | MCGONIGAL RODERICK A |
| 229 | Traction-wheel lug | US25934018 | 1918-10-23 | US1406562A | 1922-02-14 | HRUBY THOMAS J |
| 230 | Detachable lug for tractors | US35520720 | 1920-01-30 | US1402856A | 1922-01-10 | ERNEST GOLDBERGER |
| 231 | Traction-lug | US46494521 | 1921-04-27 | US1400514A | 1921-12-20 | BENTZ JOHN A |
| 232 | Automobile-wheel non-skid device | US37733220 | 1920-04-28 | US1396556A | 1921-11-08 | AUGUST CARLSON |
| 233 | Tractive lug | US39636720 | 1920-07-15 | US1395997A | 1921-11-01 | RICHIE DAVID R |
| 234 | Ground-gripping device for tractors | US31675419 | 1919-08-11 | US1395549A | 1921-11-01 | HENRY BAUCHET |
| 235 | Traction-wheel | US17004917 | 1917-05-21 | US1395422A | 1921-11-01 | JOHNSTON EDWARD A |
| 236 | Grouser for tractor-treads | US26818818 | 1918-12-24 | US1392693A | 1921-10-04 | MEYER FERD H |
| 237 | Tractor | US33638419 | 1919-11-07 | US1387225A | 1921-08-09 | ALLEN CHARLES J |
| 238 | Cleat for tractor-wheels | US31379019 | 1919-07-28 | US1375665A | 1921-04-26 | BARBOUR WOLSEY R |
| 239 | Tractor tread-shoe | US26695318 | 1918-12-16 | US1375315A | 1921-04-19 | PARK JAMES D |
| 240 | Traction-wheel | US34770219 | 1919-12-27 | US1372142A | 1921-03-22 | JAMISON ROBERT W |
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