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| Patents for Merrick M. Barnes | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 271,401 | Jan. 30, 1883 | M.M. Barnes | Micrometer Indicating Gage | |
 | 280,339 | Jul. 03, 1883 | M.M. Barnes | Micrometer Calipers | |
 | 324,804 | Aug. 25, 1885 | M.M. Barnes | Micrometer Caliper | |
 | 325,233 | Sep. 01, 1885 | M.M. Barnes | Micrometer Caliper | |
 | 346,456 | Aug. 03, 1886 | M.M. Barnes | Micrometer Calipers | |
 | 346,705 | Aug. 03, 1886 | M.M. Barnes | Micrometer Calipers | |
 | 346,706 | Aug. 03, 1886 | M.M. Barnes | Micrometer Caliper Handle | |