Granted Patent
Utility
US 6,499,504 · App. 10/142,368
Control system for controlling multiple compressors
Inventor:
Ernest J. Wichert
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: May 9, 2002
Inventor
Ernest J. Wichert
Assignee (at issue)
Scales Air Compressor
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.