Granted Patent
Utility
US 5,935,146 · App. 08/959,262
Method for monitoring the patency of pneumatic tubing
Inventors:
James A. McEwen, Michael Jameson
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Oct 28, 1997
Inventors
James A. McEwen
Michael Jameson
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.