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| Patents for Boulet's Fine Tool Works | |||||
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| Number | Date | Patentee | Title | Type | |
| 643,080 | Feb. 06, 1900 | J. Boulet | Gear Tooth Calipers | measurement gauges | |
| 659,048 | Oct. 02, 1900 | J. Boulet | Micrometer Indicator | test indicators | |
| 682,450 | Sep. 10, 1901 | J. Boulet | Micrometer Indicator | test indicators | |
| 752,752 | Feb. 23, 1904 | J. Boulet | Micrometer Indicator | test indicators | |