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| Patents for E. T. Brown | |||||
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| Number | Date | Patentee | Title | Type | |
| 50,320 | Oct. 10, 1865 | J.M. Albertson | Improvement in cut-off valves | ||
| 75,870 | Mar. 24, 1868 | C.M. Daboll | Improvement in braces for bits | brace chucks | |
| 80,812 | Aug. 11, 1868 | C.M. Daboll | Improvement in drill-stock | eggbeater drills | |
| 94,441 | Aug. 31, 1869 | H. Reynolds | Apparatus for Welding Chain Links | chain making machines | |