| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Louis B. Erwin | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 764,282 | Jul. 05, 1904 | W.O. Duntley | Battery-cell | ||
| 871,436 | Nov. 19, 1907 | R. Parmelee | Pipe Wrench | chain and strap wrenches | |
| 887,502 | May 12, 1908 | W.J. McVicker | Internal Combustion Engine | internal combustion engine valves | |
| 904,851 | Nov. 24, 1908 | W.O. Duntley, H.J. Kimman | Controller for electric drills | handheld power drills | |
| 1,109,325 | Sep. 01, 1914 | W.O. Duntley | Electric drill | handheld power drills | |