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| All Patents in class 277/431 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 819,820 | May 08, 1906 | E.M. Tingley | Ventilating Means for Inclosed Machines | |
| 845,701 | Feb. 26, 1907 | J.L. Moore | Turbine Shaft Packing | ||