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| All Patents in class 100/194 | |||||
| Picture | Number | Date | Patentee | Title | |
| 773,393 | Oct. 25, 1904 | J.H. Hubbell | Oil-press | ||
| 825,462 | Jul. 10, 1906 | J.H. Hubbell | Oil-press box | ||
![]() | 2,784,754 | Mar. 12, 1957 | V. Berthelsen | Hydraulic systems | |