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| Patents for Percy H. D. Walker | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,106,602 | Aug. 11, 1914 | P.H. Walker, V.E. Walker | Swivel Vise | |
 | 1,778,576 | Oct. 14, 1930 | P.H. Walker | Clamping element for vises and similar articles | |