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| Patents Granted on 1851-07-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,216 | Jul. 15, 1851 | J.M. Bottum | Mode of Securing Pinions and Staffs of Watches in Lathe or Bench Chucks | watchmakers lathes | |
| 8,217 | Jul. 15, 1851 | E.K. Browning | Machine for cutting wood into shreds and crimping them for mattress stuffing, &c. | excelsior machines | |
| 8,230 | Jul. 15, 1851 | D. Woodcock | Machine for sawing and dressing staves | barrel making machines | |