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| Patents for John G. Hayward | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,448,859 | Mar. 20, 1923 | A.J. Parkhurst | Antiskid device | ||
| 1,478,118 | Dec. 18, 1923 | E.J. Henderson | Nailing machine | nailing machines | |