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| Patents for Covel-Hanchett Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,672,014 | Jun. 05, 1928 | A. Williams | Power-transmission mechanism | making sawblades | |
| 1,753,590 | Apr. 08, 1930 | F.K. Benedict | Workholder for bar-grinding machines | ||