| Patents for Franklin Hardinge |
Patents 31 -
45
of 56
      |
| Number | Date | Patentee | Title | Type |
| 1,322,564 | Nov. 25, 1919 | F. Hardinge | Watchman's clock | |
| 1,330,184 | Feb. 10, 1920 | F. Hardinge | Fastener for closures | metal lathes |
| 1,334,242 | Mar. 16, 1920 | F. Hardinge | Gear mechanism | metal lathes |
| 1,362,790 | Dec. 21, 1920 | F. Hardinge | Gear mechanism for lathes | metal lathes |
| 1,393,777 | Oct. 18, 1921 | F. Hardinge | Method of and apparatus for lining furnace fireboxes | industrial furnaces |
| 1,403,952 | Jan. 17, 1922 | F. Hardinge | Fuel oil burner | industrial furnaces |
| 1,417,520 | May 30, 1922 | F. Hardinge | 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 |
| 1,456,799 | May 29, 1923 | F. Hardinge | Oil burner | industrial furnaces |
| 1,470,974 | Oct. 16, 1923 | F. Hardinge | Valve | industrial furnaces |
| 1,546,580 | Jul. 21, 1925 | F. Hardinge | Valve | industrial furnaces |
| 1,604,776 | Oct. 26, 1926 | F. Hardinge | Valve | industrial furnaces |
| 1,619,470 | Mar. 01, 1927 | F. Hardinge | Oil burning mechanism | industrial furnaces |
