Granted Patent
Utility
US 4,610,612 · App. 06/740,816
Rotary screw gas compressor having dual slide valves
Inventor:
Erich J. Kocher
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Jun 3, 1985
Inventor
Erich J. Kocher
Assignee (at issue)
Vilter Manufacturing LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.