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| Patents for Durand Machine Works Ltd. | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,620,527 | Nov. 16, 1971 | R.E. Tyler, P.M. Carter | Sheet handling apparatus | printer | |
| 3,621,998 | Nov. 23, 1971 | V. Prochaska | Sheet grader | printer | |