Granted Patent
Utility
US 6,273,118 · App. 09/602,675
Triangular draw and return tube assembly and method of manufacturing the same
Inventor:
Kenneth A. Watson
Patented Case
View Patent ↗
Granted: Aug 14, 2001
Filed: Jun 26, 2000
Inventor
Kenneth A. Watson
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.