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| Patents for L. D. Heinrichs | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 510,414 | Dec. 12, 1893 | N. Eccles | Wrench | |
 | D27,542 | Aug. 17, 1897 | R. Whitaker | Horseshoe Calk | |
 | CA-62,580 | Feb. 07, 1899 | A.W. Ashworth, R. Ashworth | Wrench | |
 | 627,466 | Jun. 27, 1899 | A.W. Ashworth, R. Ashworth | Wrench | |
 | 628,218 | Jul. 04, 1899 | A.W. Ashworth, R. Ashworth | Wrench | |