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| Patents for William Trapp | |||||
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| Number | Title | Classification(s) | |||
| 28,701 | Stave-machine | 144/134.1, 144/3.1, 147/35.5 | |||
| 43,933 | Improvement in machines for dressing heads to barrels | 144/117.1, 144/125, 144/128, 144/225 | |||
| 43,934 | Improvement in machines for dressing staves to barrels | 144/114.1, 144/129, 144/242.1 | |||
| 43,935 | Improvement in machine for jointing headings for barrels | 147/29, 147/36 | |||