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| All Patents in class 74/41 | |||||
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| Number | Date | Patentee | Title | Type | |
| 495,689 | Apr. 18, 1893 | J. Barrett | Oil-well-drilling apparatus | oil well pumps | |
| 657,977 | Sep. 18, 1900 | O.J. Ziegler | Windmill | wind power apparatus | |
| 1,821,216 | Sep. 01, 1931 | F.G. Hobart, W.C. Heath | Pump | pumps | |
| 1,864,466 | Jun. 21, 1932 | J.M. Peterson | Tool Holder | tool holders | |
| 2,774,430 | Dec. 18, 1956 | W.J. Blazek | Latching means for die set retainers | dies for punch presses | |