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| Patents for William Frech | |||||
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| Number | Date | Patentee | Title | Type | |
| 329,447 | Nov. 03, 1885 | W. Frech | Tool Holding Attachment for Lathes | metal lathe accessories and attachments | |
| 336,849 | Feb. 23, 1886 | W. Frech | Drilling-machine | drill presses | |