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| All Patents in class 104/178 | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 644,675 | Mar. 06, 1900 | J.T. Ludlow | Rope-tramway system | |
| 3,427,992 | Feb. 18, 1969 | J.L. Olson, V.C. Jones | Control apparatus | ||