| 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 | Harrow device | US57286966 | 1966-07-20 | US3322203A | 1967-05-30 | JOHNSON WENDELL J |
| 162 | Clamp assembly for a harrow tooth | US36148864 | 1964-04-21 | US3279869A | 1966-10-18 | ANDERS ANDERSEN |
| 163 | Soil cultivating implements | US40942564 | 1964-11-06 | US3252524A | 1966-05-24 | DER LELY CORNELIS VAN; DER LELY ARY VAN |
| 164 | Earth working tool having a torsion spring support | US13626961 | 1961-09-06 | US3209841A | 1965-10-05 | DER LELY CORNELIS VAN; DER LELY ARY VAN |
| 165 | Soil stopping harrow tooth attachment | US56765256 | 1956-02-24 | US2855836A | 1958-10-14 | SUTHERLAND JACOB W |
| 166 | Harrow tooth mounting | US14657350 | 1950-02-27 | US2688909A | 1954-09-14 | WATERSTREET ROY W |
| 167 | Spike tooth harrow | US59318945 | 1945-05-11 | US2610456A | 1952-09-16 | STRANDLUND CARL G |
| 168 | Separable clamping device for harrow bars | US37875041 | 1941-02-13 | US2307930A | 1943-01-12 | KUCERA JOSEPH B |
| 169 | Drag harrow | US25641739 | 1939-02-15 | US2258433A | 1941-10-07 | ZINK WILLIAM L |
| 170 | Scarifier tooth | US64158432 | 1932-11-07 | US1965950A | 1934-07-10 | WALKER CARROLL M |
| 171 | Flexible harrow or cultivator | US57727831 | 1931-11-25 | US1905671A | 1933-04-25 | WILLIAM AITKENHEAD |
| 172 | Harrow tooth | US54573831 | 1931-06-20 | US1897550A | 1933-02-14 | COLEMAN JAMES E |
| 173 | Detachable spring-tooth harrow point | US50456130 | 1930-12-24 | US1853706A | 1932-04-12 | STEINER HENRY A |
| 174 | Harrow and tooth thereof | US21613127 | 1927-08-29 | US1784655A | 1930-12-09 | BUDD GERALD J |
| 175 | Harrow-tooth holder | US31215128 | 1928-10-12 | US1760341A | 1930-05-27 | BREWTON JOSEPH L |
| 176 | Harrow-tooth clip | US46378821 | 1921-04-23 | US1435092A | 1922-11-07 | THOMAS JEPTHA A |
| 177 | Seed-planter. | US10645316 | 1916-06-28 | US1211603A | 1917-01-09 | LETRICH JOSEPH |
| 178 | Spring-tooth. | US8289916 | 1916-03-08 | US1185498A | 1916-05-30 | GOODING HARRY M |
| 179 | Road-grading machine. | US5099215 | 1915-09-16 | US1185358A | 1916-05-30 | WILLIAMS WILLIAM R |
| 180 | Lamp-stand body. | US1913800311 | 1913-11-11 | US1142108A | 1915-06-08 | MCKAY WILLIAM A; CLAUSSEN MARTIN |
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