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| Patents for Brennan & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 102,847 | May 10, 1870 | C. Meiners | Improvement in head-blocks of saw-mills | sawmill headblocks | |
| 98,647 | Jul. 04, 1870 | A.L. Vairin | Wheel Harrow | harrows | |
| 168,762 | Oct. 11, 1875 | L.H. McGinnes | Harrow | harrows | |
| 631,844 | Aug. 29, 1899 | T. Brennan, Jr. | Seeding-Machine | seeders | |