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| Patents for Haff Manufacturing Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 315,773 | Apr. 14, 1885 | E.P. Haff | Corkscrew | cork easers | |
| 317,123 | May 05, 1885 | E.P. Haff | Corkscrew | T corkscrews and other straight corkscrews | |
| 356,936 | Feb. 01, 1887 | L.R. Haff | Pocket-corkscrew | pocket and protected cork extractors | |