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| All Patents in class 221/237 | |||||
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| Number | Date | Patentee | Title | Type | |
| 37,590 | Feb. 03, 1863 | J.H. Pratt | News-Distributer by Balloons | ||
| 2,823,816 | Feb. 18, 1958 | W.B. Eddison | Seal Transferring Apparatus | bottle cappers | |
| 2,967,444 | Jan. 10, 1961 | R.S. Litterst, E.E. Hallberg | Thread Rolling Machines | thread rolling machines | |