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| Patents for Peter M. Henkes | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,964,319 | Jun. 26, 1934 | P.M. Henkes, G. Gorton | Engraving Machine | metal engraving machines | |
| 2,005,696 | Jun. 18, 1935 | G. Horner, P.M. Henkes, G. Gorton | Machine Tool | milling machines | |
| 2,100,953 | Nov. 30, 1937 | P.M. Henkes, G. Gorton | Engraving and Related Machines | metal engraving machines | |
| 2,110,873 | Mar. 15, 1938 | P.M. Henkes, G. Gorton | Engraving Machine | metal engraving machines | |
| D172,597 | Jul. 13, 1954 | P.M. Henkes | Milling Machine Unit | milling machines | |