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| Patents for Wohlnip Products, Inc. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,771,297 | Nov. 20, 1956 | W. Nipken | Adjustable stop for a collet or the like | work holding | |
| 2,823,563 | Feb. 18, 1958 | W. Nipken | Depth control attachment for a drill or the like | drilling and boring | |
| 2,915,925 | Dec. 08, 1959 | W. Nipken | Depth control attachment for a drill or the like | drilling and boring | |