Granted Patent
Utility
US 4,704,069 · App. 06/908,016
Method for operating dual slide valve rotary gas compressor
Inventors:
Erich J. Kocher, Paul G. Szymaszek
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: Sep 16, 1986
Inventors
Erich J. Kocher
Paul G. Szymaszek
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.