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| All Patents in class 74/69 | |||||
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| Number | Date | Patentee | Title | Type | |
| 240,881 | May 03, 1881 | C.M. Brown | Power-hammer | trip and helve hammers | |
| 495,689 | Apr. 18, 1893 | J. Barrett | Oil-well-drilling apparatus | oil well pumps | |