| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Tiller attachment for plows | US5133748 | 1948-09-27 | US2562625A | 1951-07-31 | JULIUS LOTHEN |
| 162 | Combined plow and harrow | US70439746 | 1946-10-19 | US2555438A | 1951-06-05 | ELLISON CLARENCE M |
| 163 | Ground breaking attachment for lister plows | US45853742 | 1942-09-16 | US2346073A | 1944-04-04 | HOLDER ANDREW J |
| 164 | Plow | US52127831 | 1931-03-09 | US1965575A | 1934-07-10 | CLARK OTTO B |
| 165 | Farm implement | US66461533 | 1933-04-05 | US1941306A | 1933-12-26 | LOUIS HOTTO |
| 166 | Spring tooth harrow attachment for plows | US53404031 | 1931-04-30 | US1847336A | 1932-03-01 | FIKE ROY H |
| 167 | Soil pulverizer | US23354227 | 1927-11-16 | US1820096A | 1931-08-25 | SOULE GEORGE M |
| 168 | Hitch for agricultural implements | US39019329 | 1929-09-03 | US1756305A | 1930-04-29 | RAMSEIER EDWARD F |
| 169 | Soil pttlvebizeb | US17013D | USRE17013E | 1928-06-26 | ||
| 170 | Harrow attachment for plows | US8576726 | 1926-02-03 | US1596838A | 1926-08-17 | HOUSER WALTER C |
| 171 | Soil pulverizer | US306525 | 1925-01-17 | US1548067A | 1925-08-04 | STOLTZ CASSIUS A |
| 172 | Plow attachment | US55109522 | 1922-04-10 | US1499158A | 1924-06-24 | DOUGLASS SAMUEL E |
| 173 | Plowshare | US55289522 | 1922-04-15 | US1475743A | 1923-11-27 | OMER BROWN |
| 174 | Plow fender | US44992421 | 1921-03-05 | US1450828A | 1923-04-03 | ANDERSON ROBERT M |
| 175 | Plow | US42522420 | 1920-11-19 | US1416392A | 1922-05-16 | RALPH WHIPPLE |
| 176 | Guard for tractor-drawn plows | US42522320 | 1920-11-19 | US1413641A | 1922-04-25 | RALPH WHIPPLE |
| 177 | Plow | US33663519 | 1919-11-08 | US1359630A | 1920-11-23 | JULIUS SZIDLAUSKAS |
| 178 | Machine for cultivating unbroken ground | US28245519 | 1919-03-13 | US1353012A | 1920-09-14 | GUSTAV AASETH |
| 179 | Reversible plow. | US1910565190 | 1910-06-06 | US1126603A | 1915-01-26 | WIARD HARRY; SPIRE ALVIN J |
| 180 | Grading-machine. | US1912736569 | 1912-12-13 | US1107457A | 1914-08-18 | SMITH LINSEY F |
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