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| Patents for David C. Walter | |||||
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| Number | Date | Patentee | Title | Type | |
| 320,357 | Jun. 16, 1885 | J. Huber | Wrench | quick adjust wrenches | |
| 763,590 | Jun. 28, 1904 | R.J. Berthoud | Wrench | jar wrenches | |