| Patents for Lester F. Nenninger |
Patents 1 -
15
of 91
      |
| Number | Date | Patentee | Title | Type |
| 1,315,722 | Sep. 09, 1919 | R.T. Hazelton | Machine-tool | milling machines |
| 1,524,969 | Feb. 03, 1925 | S. Einstein, L.F. Nenninger | Centerless Grinding Machine | centerless grinders |
| 1,575,557 | Mar. 02, 1926 | L.F. Nenninger, S.F. Einstein | Work Rest and Guiding Device for Grinding Machines | centerless grinders |
| 1,575,558 | Mar. 02, 1926 | W.D. Archea, L.F. Nenninger, S. Einstein | Centreless Grinding Machine | centerless grinders |
| 1,625,738 | Apr. 19, 1927 | L.F. Nenninger | Machine Tool Clutch | milling machines |
| 1,654,213 | Dec. 27, 1927 | L.F. Nenninger, S. Einstein | Steady-Rest Mechanism for Grinding Machines | grinding machines |
| 1,663,991 | Mar. 27, 1928 | L.F. Nenninger | Centerless Work Guide | grinding machines |
| 1,679,413 | Aug. 07, 1928 | H.R. Isler, L.F. Nenninger, S. Einstein | Cutter Grinder | tool grinders |
| 1,731,482 | Oct. 15, 1929 | L.F. Nenninger, H. Ernst | Spindle Oscillator | grinding machines |
| 1,747,903 | Feb. 18, 1930 | L.F. Nenninger | Machine Tool Control | machine tool controls |
| 1,761,841 | Jun. 03, 1930 | L.F. Nenninger | Milling Machine | milling machines |
| 1,791,713 | Feb. 10, 1931 | L.F. Nenninger, J.E. Caster | Centerless Grinder | grinding machines |
| 1,794,361 | Mar. 03, 1931 | L.F. Nenninger, B.P. Graves, E.J. Kearney, J.B. Armitage | Milling-Machine Spindle and Tool | milling machine tools |
| 1,804,197 | May 05, 1931 | L.F. Nenninger, W.D. Archea, G.W. Binns | Centerless Grinding | grinding machines |
| 1,825,753 | Oct. 06, 1931 | L.F. Nenninger | Truing Mechanism | grinding machines |
