| Patents for William F. Groene |
Patents 181 -
195
of 212
      |
| Number | Date | Patentee | Title | Type |
| 2,305,868 | Dec. 22, 1942 | H.J. Siekmann, W.F. Groene | Work Handling Device | metalworking machine mechanisms |
| 2,310,691 | Feb. 09, 1943 | W.F. Groene | Tool Holder for Lathes | metalworking machine mechanisms |
| 2,311,591 | Feb. 16, 1943 | R.M. Bacon, W.F. Groene | Step Threading Mechanism | metalworking machine mechanisms |
| 2,317,099 | Apr. 20, 1943 | W.F. Groene, H.J. Siekmann | Step threading machine | gunsmith |
| 2,318,155 | May 04, 1943 | W.F. Groene, H.F. Stoffregen, Jr. | Gun rifling machine | gunsmith |
| 2,318,305 | May 04, 1943 | W.F. Groene | Circular Shaping Apparatus | metal shapers |
| 2,319,451 | May 18, 1943 | W.F. Groene, W.R. Meyer | Gun rifling machine | gunsmith |
| 2,320,983 | Jun. 01, 1943 | W.R. Meyer, W.F. Groene | Crankshaft Chuck | metal lathe chucks |
| 2,322,127 | Jun. 15, 1943 | W.F. Groene | Vertical circular shaping machine | metal shapers |
| 2,325,849 | Aug. 03, 1943 | W.F. Groene, H.J. Siekmann | Steady rest for lathes | metal lathe accessories and attachments |
| 2,326,638 | Aug. 10, 1943 | H.J. Siekmann, W.F. Groene | Machine tool coolant system | gunsmith |
| 2,330,968 | Oct. 05, 1943 | H.J. Siekmann, W.F. Groene | Multiple Spindle Broaching Lathe Indexing Mechanism | metalworking machine mechanisms |
| D136,601 | Nov. 02, 1943 | W.F. Groene | Lathe | engine lathes |
| 2,348,973 | May 16, 1944 | H.J. Siekmann, W.F. Groene | Spindle Control Mechanism | metalworking machine mechanisms |
| 2,354,009 | Jul. 18, 1944 | H.J. Siekmann, W.F. Groene | Crankshaft Chuck | metal lathe chucks |
