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| Patents for Edward P. Shaffer | |||||
| Number | Date | Patentee | Title | Type | |
| 114,053 | Apr. 25, 1871 | E.P. Shaffer | Improvement in Carpet Stretchers | carpet stretchers | |
| 292,693 | Jan. 29, 1884 | E.P. Shaffer | Carpet Stretcher | carpet stretchers | |
| 377,782 | Feb. 14, 1888 | E.P. Shaffer | Oil Cup | oil cups | |