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| Patents for H. E. Cole | |||||
| Number | Date | Patentee | Title | Type | |
| 488,280 | Dec. 20, 1892 | J.P. Lavigne | Micrometer Gage | micrometers | |
| 488,281 | Dec. 20, 1892 | J.P. Lavigne | Micrometer Gage | micrometers | |