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| Patents Granted on 1799-08-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 254X | Aug. 05, 1799 | J. Long | Napping Hats | milliner | |
| 255X | Aug. 14, 1799 | R. Robotham | Purifying spermaceti oil | purifying oil | |
| GB-179,902,340 | Aug. 29, 1799 | W. Murdoch | Steam wheel | rotary steam engines | |
| 256X | Aug. 30, 1799 | S.E. Hamlin | Capstan fire engine | fire engines | |