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| Patents for William M. Gray | |||||
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| Number | Date | Patentee | Title | Type | |
| 71,871 | Dec. 10, 1867 | W.M. Gray | Gray's Patent Bed Wrench | ratchet wrenches | |
| 184,775 | Nov. 28, 1876 | W.M. Gray | Improvement in Bed-Key Hammers | wrench combination tools | |
| 222,102 | Nov. 25, 1879 | W.M. Gray, D.T. Thompson | Improvement in drag-sawing machines | drag saws | |