Granted Patent
Utility
US 4,609,329 · App. 06/720,323
Micro-processor control of a movable slide stop and a movable slide valve in a helical screw rotary compressor with an enconomizer inlet port
Inventors:
Joseph W. Pillis, Hans C. Wile
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Apr 5, 1985
Inventors
Joseph W. Pillis
Hans C. Wile
Assignee (at issue)
Frick Company
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.