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| Patents Granted on 1915-04-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,135,814 | Apr. 15, 1915 | E.A. King | Square | try squares | |
| GB-191,316,756 | Apr. 15, 1915 | T.P. MacNab, G.W. Pepys-Goodchild | Improvements in or relating to grinding or sandpapering machines | belt sanders | |