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| Patents for William H. Lewis | |||||
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| Number | Date | Patentee | Title | Type | |
| 16,738 | Mar. 03, 1857 | W.H. Lewis, W. Lewis | Photographic-Plate Vise | ||
| 290,218 | Dec. 18, 1883 | C.W. Drake | Screw holding screwdriver | screwdriver mechanisms | |
| 336,815 | Feb. 23, 1886 | E.B. Barker, W.H. Lewis | Stand for Photographic Cameras | camera tripods | |
| 629,379 | Jul. 25, 1899 | W.H. Lewis | Photographic Tripod | camera tripods | |