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| Patents for Robert Lockhart | |||||
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| Number | Date | Patentee | Title | Type | |
| XC-2,282 | Mar. 20, 1867 | R. Lockhart | Hub and felloe boring machine for the use of wheel-wrights | wheelwright | |
| XC-2,283 | Mar. 20, 1867 | R. Lockhart | Self centering face sett for the use of wheelwrights | wheelwright | |