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| Patents for Bridgeport Manufacturing Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 78,183 | May 26, 1868 | W.C. Burch | Improved hand-drill | |
 | 438,848 | Oct. 21, 1890 | N.B. Keyes | Sheet-Metal Pliers | |
 | 557,615 | Apr. 07, 1896 | A. Schatz | Parallel Jaw Pliers | |
 | 571,021 | Nov. 10, 1896 | A. Schatz | Parallel Jaw Pliers | |
 | 672,654 | Apr. 23, 1901 | N.B. Keyes, W.F. Hobbs, E.N. Sperry | Pliers | |
 | 672,673 | Apr. 23, 1901 | E.N. Sperry, W.F. Hobbs | Pliers | |