Granted Patent
Utility
US 5,567,121 · App. 08/376,234
Indicator-ported discharge valves for reciprocating compressors
Inventor:
William Peterson
Patented Case
View Patent ↗
Granted: Oct 22, 1996
Filed: Jan 23, 1995
Inventor
William Peterson
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.