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| Patents for Heiko Tjark de Man | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,960,126 | Nov. 15, 1960 | H.T. de Man | Power operated cutting tool | handheld power tools | |
| 3,022,509 | Feb. 27, 1962 | H.T. de Man | Nailer | handheld nailers | |
| 3,042,925 | Jul. 10, 1962 | L. Frostad, H.T. de Man | hand nailer | handheld nailers | |