David F. Graham |
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Page Sections
Documents |
| Date | Document Name & Details | Documents |
|---|---|---|
| 14 January 1896 | Street-Sweeper. United States Patent US 553,066 Erastus L. Hawks and David F. Graham for the International Sweeping Machine Company |  PDF - 370KB - 4 pages |
| 14 January 1896 | Street-Sweeper. United States Patent US 553,029 David F. Graham for the International Sweeping Machine Company | PDF - 726KB - 7 pages |