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