| All Patents of Type: internal combustion engine indicators |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 949,129 | Feb. 15, 1910 | F. Purdy | Engine Indicating Apparatus | internal combustion engine indicators |
| 1,030,216 | Jun. 18, 1912 | J.N. Wallace | Indicator for Steam, Gas and Other Engines | steam engine indicators |
| 1,041,061 | Oct. 15, 1912 | A. Frisch | Indicating Mechanism | steam engine indicators |
| 1,093,244 | Apr. 14, 1914 | C.W. Berry | Recorder | internal combustion engine indicators |
| 1,161,875 | Nov. 30, 1915 | H.C. Morrow | Gas Engine Recorder | internal combustion engine indicators |
| 1,201,557 | Oct. 17, 1916 | W.P. Clyde | Steam and Internal Combustion Engine Indicator | steam engine indicators |
| 1,280,354 | Oct. 01, 1918 | W.P. Holden, C.J. Zigler | Compression Recorder | internal combustion engine indicators |
| 1,426,735 | Aug. 22, 1922 | C.E. Reddig, W.F. Hendry | Method and Apparatus for Recording Pressure | pressure indicators |
| 1,447,913 | Mar. 06, 1923 | W.C. Duryea, A. Trowbridge | Recording Indicator | pressure indicators |
| 1,490,223 | Apr. 15, 1924 | T. Midgley, Jr. | Indicator | pressure indicators |
| 1,492,754 | May 06, 1924 | J.H. Sheats | Engine Indicator | internal combustion engine indicators |
| 1,511,574 | Oct. 14, 1924 | E.H. Mortsell | Indicating and Recording Instrument | internal combustion engine indicators |
| 1,655,615 | Jan. 10, 1928 | P. Kreisel | Recording and Timing Device for Combustion Engines | internal combustion engine indicators |
| 1,773,240 | Aug. 19, 1930 | A. Reid | Internal Combustion and Other Fluid Pressure Engine Indicator | internal combustion engine indicators |
| 1,890,601 | Dec. 13, 1932 | C.E. Cox | Internal Combustion Indicator | internal combustion engine indicators |
