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| All Patents in class 285/390 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 30,678 | Nov. 20, 1860 | B. Holly | Hose Coupling Nut | |
 | 49,142 | Aug. 01, 1865 | J. Old | Pipe Coupling | |
 | 319,144 | Jun. 02, 1885 | N. Stephens, M.L. Ritchie | Method of utilizing old boiler-tubes | |
 | 447,775 | Mar. 10, 1891 | C.A. Higbee | Screw bolt and nut | |
 | 597,000 | Jan. 11, 1898 | C.A. Higbee | Pipe coupling | |
 | 946,919 | Jan. 18, 1910 | A.A. Koch | Corrugated culvert and process of producing same | |
 | 2,079,692 | May 11, 1937 | F.J. Lapointe | Broach shank connector | |