Granted Patent
Utility
US 5,149,254 · App. 07/711,337
Refrigeration compressor having a contoured piston
Inventor:
Delmer R. Riffe
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Jun 6, 1991
Inventor
Delmer R. Riffe
Assignee (at issue)
White Consolidated Industries, 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.