| All Patents in class 73/114.18 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 1,426,735 | Aug. 22, 1922 | C.E. Reddig, W.F. Hendry | Method and Apparatus for Recording Pressure |
| | 1,447,913 | Mar. 06, 1923 | W.C. Duryea, A. Trowbridge | Recording Indicator |
| | 1,490,223 | Apr. 15, 1924 | T. Midgley, Jr. | Indicator |
| | 1,492,754 | May 06, 1924 | J.H. Sheats | Engine Indicator |
| | 1,511,574 | Oct. 14, 1924 | E.H. Mortsell | Indicating and Recording Instrument |
| | 1,539,978 | Jun. 02, 1925 | G.B. Vroom | Chronograph |
| | 2,365,227 | Dec. 19, 1944 | C. Unterberg | Engine Operation Analyzer |
