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