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| All Patents in class 122/50 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 32,682 | Jul. 02, 1861 | F. Colligon (Collingon) | Steam Boiler Firebox | |
| 350,440 | Oct. 05, 1886 | J.A. Mumford | Steam-boiler | ||
| 368,679 | Aug. 23, 1887 | J.A. Mumford | Steam-boiler | ||
| 382,657 | May 08, 1888 | J.A. Mumford | Steam-boiler | ||
| 558,698 | Apr. 21, 1896 | J.A. Mumford | Steam-boiler | ||
| 755,046 | Mar. 22, 1904 | D.W. Robb | Steam Boiler | ||