| Patents for Joseph H. Hoern |
Patents 1 -
10
of 19
      |
| Picture | Number | Date | Patentee | Title |
| | 1,772,082 | Aug. 05, 1930 | J.H. Hoern | Device for Assembling and Holding Piston Rings for Machining Operations |
| | 1,783,121 | Nov. 25, 1930 | J.H. Hoern | Piston Ring Burr Removing Device |
 | 1,900,112 | Mar. 07, 1933 | J.H. Hoern | Grinding machine |
 | 1,910,767 | May 23, 1933 | J.H. Hoern | Method of making tappets |
| | 1,925,384 | Sep. 05, 1933 | J.H. Hoern | Ring Resawing Machine |
| | 2,240,440 | Apr. 29, 1941 | J.H. Hoern | Apparatus for Honing Internal Screw Threads |
| | 2,259,640 | Oct. 21, 1941 | J.H. Hoern | Thread Forming Apparatus |
| | 2,265,561 | Dec. 09, 1941 | J.H. Hoern | Method of Making Valve Tappets |
| | 2,359,477 | Oct. 03, 1944 | J.H. Hoern | Method of Making Hollow Head Valves |
| | 2,367,398 | Jan. 16, 1945 | J.H. Hoern | Thread Rolling Apparatus |
