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| Patents for A. B. Farquhar Co., Ltd. | |||||
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| Number | Date | Patentee | Title | Type | |
| 168,469 | Oct. 05, 1875 | A.B. Farquhar | Improvement in horse-powers | animal powered apparatus | |
| 345,580 | Jul. 13, 1886 | B.M. Root, H.W. Eisenhart, A.B. Farquhar | Fertilizer-distributor | ||
| 411,679 | Sep. 24, 1889 | S.T. Reamy | Saw-mill feed | sawmill feed works | |
| 495,405 | Apr. 11, 1893 | H.B. Waltman, S.S. Morton, H.W. Eisenhart | Sawmill-setworks | sawmill set works | |