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| Patents for Wainwright Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 390,899 | Oct. 09, 1888 | C.D. Wainwright, R.F. Pratt | Machine for Corrugating Wrought Metal Tubes | ||
| 426,439 | Apr. 29, 1890 | J.F. Fife | Machine for Corrugating Tubing | ||
| 432,232 | Jul. 15, 1890 | J.F. Fife | Machine for Corrugating Wrought Metal Tubing | ||
| 434,060 | Aug. 12, 1890 | C.D. Wainwright, J.S. Hansen | Machine for Corrugating Tubes | ||