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| Patents for Paul F. Hayr | |||||
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| Number | Date | Patentee | Title | Type | |
| 164,413 | Jun. 15, 1875 | W.F. Barnes, J. Barnes | Improvement in mechanical movements | human powered machines | |
| 164,414 | Jun. 15, 1875 | W.F. Barnes, J. Barnes | Improvement in mechanical movements | human powered machines | |