Granted Patent
Utility
US 6,349,748 · App. 09/537,277
Insulated tubing
Inventors:
John Dodds, Michael Posson, Joseph A. Schwalbach, Donald R. Warr
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: Mar 29, 2000
Inventors
John Dodds
Michael Posson
Joseph A. Schwalbach
Donald R. Warr
Assignee (at issue)
ROBROY INDUSTRIES
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.