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 | Improvement in cultivators | US110419D | US110419A | 1870-12-27 | ||
262 | Improvement in plows | US108095D | US108095A | 1870-10-11 | ||
263 | Improvement in harrows | US107057D | US107057A | 1870-09-06 | ||
264 | Improvement in potato-plows | US106702D | US106702A | 1870-08-23 | ||
265 | Improvement in weed-cutters | US105529D | US105529A | 1870-07-19 | ||
266 | Improvement in double-shovel plows | US100298D | US100298A | 1870-03-01 | ||
267 | Improvement in harrows | US92320D | US92320A | 1869-07-06 | ||
268 | Improvement in cultivator-flows | US88025D | US88025A | 1869-03-23 | ||
269 | Improvement in cultivators | US78626D | US78626A | 1868-06-02 | ||
270 | George spiehlman | US69943D | US69943A | 1867-10-15 | ||
271 | John e | US66869D | US66869A | 1867-07-16 | ||
272 | Improvement in cultivators | US39337D | US39337A | 1863-07-28 | ||
273 | Improvement in cultivators | US33044D | US33044A | 1861-08-13 | ||
274 | Improvement in plows | US31903D | US31903A | 1861-04-02 | ||
275 | Improvement in cultivators | US26121D | US26121A | 1859-11-15 | ||
276 | Improvement in plows | US18463D | US18463A | 1857-10-20 | ||