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| Patents for Louis Mastrangel | |||||
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| Number | Date | Patentee | Title | Type | |
| 914,855 | Mar. 09, 1909 | L. Mastrangel | Micrometer Gage | micrometers | |
| 1,001,419 | Aug. 22, 1911 | L. Mastrangel | Multiple-Spindle Dividing-Head | indexers and dividers | |