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| Patents for Frontier Machine Tool Co., Inc. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,426,052 | Aug. 15, 1922 | J. Eckhard | Drill press | drill presses | |
| 1,441,668 | Jan. 09, 1923 | J. Eckhard | Drill press | drill presses | |