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| Patents for William H. May | |||||
| Number | Date | Patentee | Title | Type | |
| 61,549 | Jan. 29, 1867 | W.H. May | Imitation of open carving in wood | wood compressing machines | |
| 72,877 | Dec. 31, 1867 | W.H. May | Improved method of preparing wood for musical instruments | music instrument maker | |