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| Patents for Walter Nipken | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,499,408 | Mar. 07, 1950 | W. Nipken | Work holder | |
 | 2,623,440 | Dec. 30, 1952 | W. Nipken | Unitary work holder | |
 | 2,744,311 | May 08, 1956 | E. Nipken, W. Nipken | Drill extractor | |
 | 2,771,297 | Nov. 20, 1956 | W. Nipken | Adjustable stop for a collet or the like | |
 | 2,823,563 | Feb. 18, 1958 | W. Nipken | Depth control attachment for a drill or the like | |
 | 2,915,925 | Dec. 08, 1959 | W. Nipken | Depth control attachment for a drill or the like | |