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| All Patents in class 277/553 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,938,786 | Dec. 12, 1933 | E.D. Vancil | Spring Operated Wiper | ||
| 3,687,464 | Aug. 29, 1972 | G.H. Schultz, R.H. Jackson | Seal | ||