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| Patents for William A. Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| 583,561 | Jun. 01, 1897 | W.A. Williamson | Corkscrew | figural cork extractors | |
| 587,900 | Aug. 10, 1897 | W.A. Williamson | Corkscrew | self and partial cork pullers | |
| D29,798 | Dec. 13, 1898 | W.A. Williamson | Cap Lift | self and partial cork pullers | |
| 657,421 | Sep. 04, 1900 | R.W. Jorres | Corkscrew | figural cork extractors | |