| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 122/20B | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 215,798 | May 27, 1879 | G.H. Corliss | Tubular Steam-Boiler | stationary boilers | |
| 866,842 | Sep. 24, 1907 | G.S. Comstock | Hot-water heating system | furnaces | |