Granted Patent
Utility
US 6,520,205 · App. 09/642,944
Compressor unloader system
Inventors:
Brian D. Sowards, Eugene Cheng
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Aug 22, 2000
Inventors
Brian D. Sowards
Eugene Cheng
Assignee (at issue)
Ingersoll-Rand 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.