| All Patents in class 73/736 |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
 | 471,383 | Mar. 22, 1892 | F.H. Haskell | Duplex Pressure Gage |
| | 677,674 | Jul. 02, 1901 | C.J. Manning | Recording Gage of Steam Pressure on Boilers |
| | 900,371 | Oct. 06, 1908 | F.H. Hopkins | Differential Pressure Gage |
| | 1,363,415 | Dec. 28, 1920 | F.H. Hopkins | Differential Pressure Gage |
| | 1,663,313 | Mar. 20, 1928 | J.W. Motherwell | Adjusting Mechanism for Pressure Gauges |
| | 1,734,977 | Nov. 12, 1929 | J.W. Motherwell | Pressure gauge |
| | 1,814,092 | Jul. 14, 1931 | J.W. Motherwell | Pressure gauge |
| | 1,848,489 | Mar. 08, 1932 | J.W. Motherwell | Pressure gauge |
| | 1,933,383 | Oct. 31, 1933 | J.W. Motherwell | Gauge |
| | 2,040,681 | May 12, 1936 | H.S. Baker | Gauge |
