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| All Patents in class 188/7 | |||||
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| Number | Date | Patentee | Title | Type | |
| 577,167 | Feb. 16, 1897 | W. Maybach | Portable Hydrocarbon Engine | ||
| 1,826,937 | Oct. 13, 1931 | J. Jensen | Anchoring means for portable supports | industrial machine bases | |