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Patents for Walter McH. Alston | |||||
Number | Date | Patentee | Title | Type | |
1,147,476 | Jul. 20, 1915 | W.M. Alston, I.E. Hindman | Lifting-jack | ||
1,151,232 | Aug. 24, 1915 | W.M. Alston, I.E. Hindman | Lifting-jack | ||
1,165,380 | Dec. 28, 1915 | W.M. Alston, I.E. Hindman | Lifting-jack |