| Patents for Harry L. Allen |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 982,893 | Jan. 31, 1911 | A.W. Stephens | Bottle Cap Remover | combination cork extractors |
| 999,901 | Aug. 08, 1911 | A.W. Stephens | Bottle Cap Remover | combination cork extractors |
| 1,046,210 | Dec. 03, 1912 | H.L. Allen, J.B. Meriam | Gas Engine Valve | internal combustion engine valves |
| 1,127,890 | Feb. 09, 1915 | H.J. Hjorth | T-Rest for Lathes | metal lathe accessories and attachments |
| 1,503,640 | Aug. 05, 1924 | H.L. Allen, C.E. Curtiss | Internal Combustion Engine | |
| 1,923,135 | Aug. 22, 1933 | H.L. Allen | Method of Cleaning and Cooling Gas Scrubbing Water and Apparatus Therefor | oil gas apparatus |
| 2,056,160 | Oct. 06, 1936 | H.L. Allen | Valve Element and the Method of Forming the Same | internal combustion engine valves |
