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| Patents for L. C. Downing | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 1,180,326 | Apr. 25, 1916 | C.E. Shields | Process of casting steel articles | |
![]() | 1,180,448 | Apr. 25, 1916 | C.E. Shields | Power-grinder | |