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| Patents for William Gray | |||||
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| Number | Date | Patentee | Title | Type | |
| 221,299 | Nov. 04, 1879 | W. Gray | Nut-Lock | auxiliary wrenches | |
| 248,587 | Oct. 25, 1881 | W. Gray | Device for Throwing Belts Onto or Off From Revolving Pulleys | belt shifters | |
| 295,543 | Mar. 25, 1884 | W. Gray | Rubber chest pad for baseball catcher | exercise and sports equipment | |