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| Patents for Ernest C. Head | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,262,192 | Apr. 09, 1918 | E.C. Head | Method of Producing Gears | ||
 | 1,656,633 | Jan. 17, 1928 | L.O. Carlsen, E. Finsen, E.C. Head | Gear-cutting machine | |
 | 1,686,523 | Oct. 09, 1928 | E.C. Head | Machine for producing gears | |
| 2,135,893 | Nov. 08, 1938 | E.C. Head | Gear cutter | ||
| 2,135,894 | Nov. 08, 1938 | E.C. Head | Machine for forming spiral bevel gear cutters | ||
| 2,270,003 | Jan. 13, 1942 | E.C. Head | Gear cutter | ||
| RE22,891 | Jun. 24, 1947 | E.C. Head | Gear cutter | ||