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All Patents in class 292/6 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 1,262,226 | Apr. 09, 1918 | F.L. Miller | Fastener for retort-doors | |
![]() | 1,300,633 | Apr. 15, 1919 | F.L. Miller | Fastener for retort-doors |