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| Patents for Louis D. Heinrichs | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 648,803 | May 01, 1900 | B. Shaw | Wrench | |
 | 653,767 | Jul. 17, 1900 | W.S. Emerson | Wrench | |
 | 701,489 | Jun. 03, 1902 | W. Love | Pipe Wrench | |