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| All Patents in class 248/288.11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 497,013 | May 09, 1893 | C.M. Brown | Power-hammer | drop hammers | |
| 2,354,046 | Jul. 18, 1944 | J.E. Oslund | Indicator Holder | test indicators | |