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| All Patents in class 277/512 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 618,435 | Jan. 31, 1899 | G. Palm | Gas Engine | ||
| 1,125,479 | Jan. 19, 1915 | C.M. Conradson | Automatic Chuck for Lathes | ||
| 1,819,417 | Aug. 18, 1931 | J.H. Holmgreen | Joint Packing | ||