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| Patents for Mary A. Cook | |||||
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| Number | Date | Patentee | Title | Type | |
| RE13,743 | Jun. 09, 1914 | F. Hardinge | Watchman's clock | ||
| 1,226,657 | May 22, 1917 | F. Hardinge | Tool holder | metal lathe accessories and attachments | |
| 1,252,346 | Jan. 01, 1918 | F. Hardinge | Lathe headstock | metal lathes | |
| 1,285,820 | Nov. 26, 1918 | C. Vergan, G. Mayer, E.J. Smith | Automatic Milling Machine | milling machines | |
| 1,315,832 | Sep. 09, 1919 | F. Hardinge | Seal for fastening devices | ||
| 1,322,564 | Nov. 25, 1919 | F. Hardinge | Watchman's clock | ||
| 1,330,184 | Feb. 10, 1920 | F. Hardinge | Fastener for closures | metal lathes | |
| 1,334,242 | Mar. 16, 1920 | F. Hardinge | Gear mechanism | metal lathes | |