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| Patents for George H. Langen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,507,070 | Sep. 02, 1924 | C.E. Linden, G.H. Langen | Planer Lubricating Device | metal planers | |
| 1,629,082 | May 17, 1927 | G.H. Langen, C.E. Linden | Traverse Mechanism | metal planers | |
| 1,707,558 | Apr. 02, 1929 | G.H. Langen, C.E. Linden | Clapper Box for Planers | metal planers | |