| All Patents in class 431/168 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 1,403,952 | Jan. 17, 1922 | F. Hardinge | Fuel oil burner | industrial furnaces |
| 1,447,384 | Mar. 06, 1923 | F. Hardinge | Fuel oil burner | industrial furnaces |
| 1,447,385 | Mar. 06, 1923 | F. Hardinge | Oil burner | industrial furnaces |
| 1,455,049 | May 15, 1923 | F. Hardinge | Oil burner | industrial furnaces |
| 1,735,245 | Nov. 12, 1929 | F. Hardinge | Oil burner | industrial furnaces |
| 1,739,548 | Dec. 17, 1929 | F. Hardinge | Oil burner | industrial furnaces |
| 1,748,416 | Feb. 25, 1930 | F. Hardinge | Oil burner | industrial furnaces |
| 1,792,222 | Feb. 10, 1931 | H.H. Hardinge | Oil burner | industrial furnaces |
