| Patents for National Steam Gauge Co. |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 16,428 | Jan. 20, 1857 | E.G. Allen | Steam-pressure gage | steam pressure gauges |
| 18,526 | Oct. 27, 1857 | E.G. Allen | Steam-pressure gage | steam pressure gauges |
| 23,032 | Feb. 22, 1859 | T.W. Lane | Steam-pressure gage | steam pressure gauges |
| 26,152 | Nov. 22, 1859 | E.G. Allen | Combination steam-gage | steam pressure gauges |
| 26,871 | Jan. 17, 1860 | E.G. Allen | Steam-gage | steam pressure gauges |
| GB-186,000,306 | Feb. 04, 1860 | E.G. Allen, A.V. Newton | An improved construction of combination steam gauge | steam pressure gauges |
| RE5,320 | Mar. 11, 1873 | T.W. Lane | Improvement in steam-gages | steam pressure gauges |
