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| Patents for Walter L. Clark | |||||
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| Picture | Number | Date | Patentee | Title | |
| 844,689 | Feb. 19, 1907 | W.L. Clark, G.T. Reiss | Tool Holder for Lathes | ||
| 857,981 | Jun. 25, 1907 | W.L. Clark | Tool Holder for Machine Tools | ||
| 1,272,219 | Jul. 09, 1918 | W.L. Clark | Drilling Machine | ||