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| Patents for Simplex Machine Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,199,312 | Sep. 26, 1916 | S.W. Sparks | Metal-working machine | metal lathes | |
| 1,242,679 | Oct. 09, 1917 | C.D. Gibson | Lathe-apron | metal lathes | |