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| All Patents in class 251/144 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 54,701 | May 15, 1866 | E. Doty | Improved plug for washing-machines | |
 | 200,649 | Feb. 26, 1878 | R.W. Eaton | Spoke-tenoning machine | |
 | 632,724 | Sep. 12, 1899 | E.R. Klemm | Bottle-filling machine | |
| 2,079,348 | May 04, 1937 | A.G. Hann | Valve | ||
 | 2,512,877 | Jun. 27, 1950 | F.F. Rike | Truck tank emergency valve | |
| 2,879,026 | Mar. 24, 1959 | R.C. Geiger, D.A. Meeker | Detachable actuator | ||