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All Patents in class 227/50 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 1,143,089 | Jun. 15, 1915 | W.X. Stevens | Box-making machine | |
![]() | 4,254,895 | Mar. 10, 1981 | E.G. Cheak | Apparatus for automatic alignment and attachment of a doorjamb and stop |