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| Patents for Harris J. Cook | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 803,669 | Nov. 07, 1905 | H.J. Cook | Bit-brace | |
 | 850,347 | Apr. 16, 1907 | H.J. Cook | Ratchet mechanism | |
 | 850,566 | Apr. 16, 1907 | H.J. Cook | Ratchet mechanism | |
 | 1,515,239 | Nov. 11, 1924 | H.J. Cook | Spirit Level | |
 | 1,839,835 | Jan. 05, 1932 | H.J. Cook | Screw driver | |
 | 1,956,275 | Apr. 24, 1934 | H.J. Cook | Fiber Board Plane | |