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| Patents for Carl H. Ingwer | |||||
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| Number | Date | Patentee | Title | Type | |
| D143,075 | Dec. 04, 1945 | C.H. Ingwer | Pipe Cutting Tool | pipe cutters | |
| D164,687 | Oct. 02, 1951 | C.E. Wright, C.H. Ingwer | Pipe Vise | pipe and chain vises | |