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| Patents for Harry S. Walthers | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,792,205 | Feb. 10, 1931 | H.S. Walthers, V.E. Martin | Cutter head | cutterheads | |
| 1,802,992 | Apr. 28, 1931 | H.S. Walthers | Circular-cutter mounting | cutterheads | |
| 1,803,741 | May 05, 1931 | V.E. Martin, H.S. Walthers | Cutter head | cutterheads | |
| 1,807,185 | May 26, 1931 | H.S. Walthers | Cutter head | cutterheads | |