| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 261 | Colter | US32332940 | 1940-03-11 | US2244774A | 1941-06-10 | JOHN HEWITT WILLIAM |
| 262 | Plowshare guard | US20892338 | 1938-05-19 | US2181007A | 1939-11-21 | BERQUIST FRANK O |
| 263 | Plow | US10875836 | 1936-11-02 | US2108351A | 1938-02-15 | SILVER WALTER H |
| 264 | Motor traction plow | US48857030 | 1930-10-14 | US1858749A | 1932-05-17 | WILLIAM PATERSON; PATERSON MAY H |
| 265 | Colter | US11782526 | 1926-06-22 | US1651938A | 1927-12-06 | WOLF EVERT E |
| 266 | Rolling colter | US1636810D | US1636810A | 1927-07-26 | ||
| 267 | Colter | US8327026 | 1926-01-23 | US1623488A | 1927-04-05 | EMIL MORBERG |
| 268 | Colter-wheel bracket | US64474523 | 1923-06-11 | US1558007A | 1925-10-20 | FREDERICK WILLIAM S |
| 269 | Colter and jointer attachment | US2929625 | 1925-05-11 | US1555881A | 1925-10-06 | JOHN SCHARDT |
| 270 | Colter cleaner | US63961623 | 1923-05-17 | US1545895A | 1925-07-14 | HAMILTON THOMAS A |
| 271 | Nonclog colter | US70020124 | 1924-03-19 | US1539066A | 1925-05-26 | ADAMY FRANK D |
| 272 | Plow | US55489522 | 1922-04-18 | US1524516A | 1925-01-27 | HURST ANDREW J |
| 273 | Plow | US42718720 | 1920-11-29 | US1425451A | 1922-08-08 | MARCELO CONTI |
| 274 | Colter | US51797821 | 1921-11-26 | US1425422A | 1922-08-08 | STROUT ELMER J |
| 275 | Attachment for plows | US26628518 | 1918-12-11 | US1405033A | 1922-01-31 | HEYLMAN EDWARD M |
| 276 | Colter-clamp | US40074720 | 1920-08-02 | US1367644A | 1921-02-08 | ELIAS VARNER ANDREW |
| 277 | Cultivator. | US8169916 | 1916-03-02 | US1267149A | 1918-05-21 | VAUGHN JOHN M |
| 278 | Colter. | US13498516 | 1916-12-04 | US1221915A | 1917-04-10 | SCHUMAKER WILLIAM |
| 279 | Roller. | US1914831153 | 1914-04-11 | US1211811A | 1917-01-09 | BAILEY JAMES G |
| 280 | Cultivator-disk mounting. | US8546516 | 1916-03-20 | US1203737A | 1916-11-07 | HOAR GUY W |
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