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| All Patents in class 433/151 | |||||
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| Number | Date | Patentee | Title | Type | |
| 781,947 | Feb. 07, 1905 | J.M. Stryhal, J.J. Hartley | Center Punch | punches | |
| 783,749 | Feb. 28, 1905 | J.J. Hartley | Center Punch | punches | |
| 789,520 | May 09, 1905 | J.A. Adell, J.L. Baltzer | Automatic prick-punch | punches | |