| 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 | Road-drag. | US1908418009 | 1908-02-27 | US893259A | 1908-07-14 | OTT FRANK E |
| 222 | Harrow. | US1907368727 | 1907-04-17 | US868510A | 1907-10-15 | WAKEFIELD HARRY URBAN |
| 223 | Seat. | US1906348114 | 1906-12-17 | US859967A | 1907-07-16 | MCLEAN ANDRUS B |
| 224 | Plow. | US1906316291 | 1906-05-11 | US852843A | 1907-05-07 | MAIN MARVIN D |
| 225 | Harrow. | US1905243687 | 1905-02-01 | US851657A | 1907-04-30 | FERGUSON JACOB C |
| 226 | Cultivator. | US1906308574 | 1906-03-28 | US847431A | 1907-03-19 | NESBITT WILLIAM H |
| 227 | Cultivator. | US1906322046 | 1906-06-16 | US847101A | 1907-03-12 | NOLF ARNOLD |
| 228 | Soil pulverizer and smoother. | US1906317762 | 1906-05-19 | US843025A | 1907-02-05 | MILLER FREDERICK |
| 229 | Plow. | US1906309812 | 1906-04-04 | US842280A | 1907-01-29 | WARREN ROBERT M |
| 230 | Controlling means for harrows. | US1906333295 | 1906-09-05 | US842239A | 1907-01-29 | PARRETT EARL AUD |
| 231 | Weeder-tooth. | US1906327725 | 1906-07-25 | US839310A | 1906-12-25 | NELSON HENRY R |
| 232 | Harrow attachment for sulky-plows. | US1906326218 | 1906-07-14 | US839038A | 1906-12-18 | SCHAAL KARL |
| 233 | Road-scarifier. | US1906318582 | 1906-05-24 | US838478A | 1906-12-11 | TODD MARQUIS J |
| 234 | Cultivator-tooth gang. | US1905253486 | 1905-04-03 | US838457A | 1906-12-11 | RIDDLE WILBUR H |
| 235 | Combined brush-rake and harrow. | US1906299581 | 1906-02-05 | US837450A | 1906-12-04 | CROOK WILLIAM J |
| 236 | Plow. | US1906325033 | 1906-07-06 | US836530A | 1906-11-20 | PERRY ALVY GREEN |
| 237 | Cultivator. | US1905286858 | 1905-11-11 | US831157A | 1906-09-18 | HELLUMS DAVID A |
| 238 | Harrow. | US1905258642 | 1905-05-03 | US825193A | 1906-07-03 | CUSHING IRA B |
| 239 | Combined cultivator, harrow, and planter. | US1905288755 | 1905-11-23 | US822609A | 1906-06-05 | JOHNSON ALFRED BUTLER |
| 240 | Harrow. | US1905272013 | 1905-07-31 | US819748A | 1906-05-08 | FRIEDEMANN AUGUST |
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