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| All Patents in class 417/320 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 8,172X | Apr. 28, 1834 | J.A. Pitts, H.A. Pitts | Endless chain pump | |
 | 172,395 | Jan. 18, 1876 | A.D. Crosby | Chain Pump | |
| 343,685 | Jun. 15, 1886 | A. Wyckoff | Bucket for chain-pumps | ||