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| All Patents in class 172/361 | |||||
| Picture | Number | Date | Patentee | Title | |
| 177X | Jun. 26, 1797 | C. Newbold | Ploughs (cast iron plough) | ||
![]() | 6,338X | Jan. 12, 1831 | E.M. Waggener | Bar-Share Plow | |
| 9,319X | Jan. 15, 1836 | J.D. (Dalkener) | Plough | ||
| 9,887X | Jul. 02, 1836 | T. Miller | Plough | ||
| AI245 | Aug. 02, 1859 | G. Watt | Plow | ||
![]() | 407,259 | Jul. 16, 1889 | C.C. Smalley | Plow | |