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| All Patents of Type: gear hob cutters | |||||
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| Number | Date | Patentee | Title | Type | |
| 924,679 | Jun. 15, 1909 | E.J. Lees | Hob for Gear Cutters | gear hob cutters | |
| 978,113 | Dec. 06, 1910 | P. Catucci | Hobbing gear-cutter | gear hob cutters | |
| GB-191,016,513 | Jul. 11, 1911 | P. Catucci | Improvements in and relating to hobbing gear cutters | gear hob cutters | |
| 2,135,893 | Nov. 08, 1938 | E.C. Head | Gear cutter | gear hob cutters | |
| 2,270,003 | Jan. 13, 1942 | E.C. Head | Gear cutter | gear hob cutters | |
| RE22,891 | Jun. 24, 1947 | E.C. Head | Gear cutter | gear hob cutters | |