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| All Patents in class 254/212 | |||||
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| 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 | |