| All Patents in class 73/732 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 292,169 | Jan. 22, 1884 | W.H. MacGregor | Pressure Gage |
| | 568,784 | Oct. 06, 1896 | E.L. Miller | Automatic Recording Instrument |
| | 643,876 | Feb. 20, 1900 | F. Lane | Pressure Gage |
| | 701,793 | Jun. 03, 1902 | E.C. Bates | Pressure Gage |
| | 829,614 | Aug. 28, 1906 | F.L. Wolfe | Pressure Recorder |
| | 877,198 | Jan. 21, 1908 | W.E. Jerauld | Automatic Recording Gage |
| | 897,311 | Sep. 01, 1908 | G. Spencer | Pressure Recorder |
| | 898,148 | Sep. 08, 1908 | G. Spencer | Pressure Gage |
| | 951,658 | Mar. 08, 1910 | A.P. Phillips | Pressure Recording Gage |
| | 1,063,281 | Jun. 03, 1913 | J.W. Motherwell | Recording-gage |
