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| Patents for Bridgeport Machine Tool Works | |||||
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| Picture | Number | Date | Patentee | Title | |
| 408,291 | Aug. 06, 1889 | E.P. Bullard | Brake for Lathe Spindles | ||
 | 511,736 | Dec. 26, 1893 | C.L. Libby | Taper Attachment and Feed Mechanism for Vertical Boring Mill | |
 | 514,719 | Feb. 13, 1894 | C.L. Libby | Boring-Mill | |