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| Patents for J. S. Hellewell | |||||
| Number | Date | Patentee | Title | Type | |
| 873,667 | Dec. 10, 1907 | G.M. Hinkley | Edger | circular ripsaws | |
| 879,265 | Feb. 18, 1908 | G.M. Hinkley | Adjustable box or bearing | circular ripsaws | |