Granted Patent
Utility
US 6,135,744 · App. 09/070,827
Piston unloader arrangement for screw compressors
Inventors:
Garry E. Andersen, Robert Mayfield
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Apr 28, 1998
Inventors
Garry E. Andersen
Robert Mayfield
Assignee (at issue)
American Standard Inc.
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.