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All Patents in class 254/374 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 1,650,936 | Nov. 29, 1927 | M.B. McLauthlin, J.W. Dodd | Elevator hoist | |
![]() | 2,152,969 | Apr. 04, 1939 | W.W. Nash | Balancer | |
2,941,249 | Jun. 21, 1960 | H.H. Rogers | Multiple Opening Press |