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| Patents for Ralph Lancaster | |||||
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| Number | Date | Patentee | Title | Type | |
| 740,812 | Oct. 06, 1903 | O.E. Kovar | Interchangeable Wrench | pipe and nut combination wrenches | |
| 821,721 | May 29, 1906 | L. Kreutzamp | Micrometer | micrometers | |