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| Patents for Joseph Boulet | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 643,080 | Feb. 06, 1900 | J. Boulet | Gear Tooth Calipers | |
 | 659,048 | Oct. 02, 1900 | J. Boulet | Micrometer Indicator | |
 | 682,450 | Sep. 10, 1901 | J. Boulet | Micrometer Indicator | |
 | 752,752 | Feb. 23, 1904 | J. Boulet | Micrometer Indicator | |
| 1,303,245 | May 13, 1919 | J. Boulet | Micrometer Indicator | ||