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| All Patents in class 299/23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 512,605 | Jan. 09, 1894 | J.M. Crouch | Quarrying Tool | quarrying tools | |
| 1,266,282 | May 14, 1918 | T. Larney | Stone Splitting Tool | stonemason | |