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| Patents for William H. Barker | |||||
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| Number | Date | Patentee | Title | Type | |
| 753,186 | Feb. 23, 1904 | G.E. Wood | Process For Making Hand Tools | screwdriver handles | |
| 765,302 | Jul. 19, 1904 | G.E. Wood | Screw Driver | screwdriver blades | |
| 793,602 | Jun. 27, 1905 | V.L. Lenard, J. Murdock | Protractor | protractors | |