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| Patents for E. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,149,581 | Aug. 10, 1915 | S.N. House | Tenon-Cutter | hollow bits | |
| 1,189,764 | Jul. 04, 1916 | H.L. Whitman | Relief-valve for internal-combustion engines | internal combustion engines | |