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| Patents for Etienne Challet | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,005,883 | Oct. 17, 1911 | E. Challet, P. Roch | Instument for Making Micrometric Measurements | measurement gauges | |
| 1,351,941 | Sep. 07, 1920 | E. Challet | Sliding Calipers | measuring calipers | |