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| Patents for Charles I. Cobb | |||||
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| Number | Date | Patentee | Title | Type | |
| 915,298 | Mar. 16, 1909 | W.G. Klemm | Grinding-machine or the like | bench or pedestal grinders | |
| 917,312 | Apr. 06, 1909 | E.R. Klemm | Friction clutch mechanism | bench or pedestal grinders | |
| 1,318,726 | Oct. 14, 1919 | E.E. Chia | Micrometer Gage | micrometers | |