| All Patents in class 73/740 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 829,552 | Aug. 28, 1906 | G. Spencer | Pressure Gage | vacuum and pressure gauges |
| 829,553 | Aug. 28, 1906 | G. Spencer | Pressure Gage | vacuum and pressure gauges |
| 1,043,618 | Nov. 05, 1912 | C.J. Manning | Pressure Gage | vacuum and pressure gauges |
| 1,166,070 | Dec. 28, 1915 | C.J. Manning | Gage for Indicating Fluid Pressures | vacuum and pressure gauges |
| 1,222,315 | Apr. 10, 1917 | C.J. Manning | Pressure Gage | vacuum and pressure gauges |
| 1,265,934 | May 14, 1918 | L.A. Mapel | Gage | gauges |
| 1,274,921 | Aug. 06, 1918 | F.J. Manning | Pressure Gage | vacuum and pressure gauges |
| 1,663,313 | Mar. 20, 1928 | J.W. Motherwell | Adjusting Mechanism for Pressure Gauges | vacuum and pressure gauges |
