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| Patents for Elmer Harrold | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,153,910 | Sep. 21, 1915 | E. Harrold | Rotary cutter-head | cutterheads | |
| 1,311,508 | Jul. 29, 1919 | E. Harrold | Saw-guard | woodworking machine safety guards | |
| 1,478,956 | Dec. 25, 1923 | E. Harrold | Exposure meter | ||
| 1,518,982 | Dec. 09, 1924 | E. Harrold | Weighing scale | ||