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| Patents for David H. Mallalieu | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,524,514 | Jun. 25, 1985 | D.C. DeVries, S.N. Apostola, D.H. Mallalieu | Combination of A Tool and A Hollow Tool Sectional Handle | tool handles | |
| 5,012,581 | May 07, 1991 | D.P. Cummings, D.H. Mallalieu, W.D. Fletcher | Universal Utility Knife | utility knives | |