Granted Patent
Utility
US 5,814,767 · App. 08/838,652
Flexible plastic ducting and method for making and forming same
Inventor:
Neal Katz
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Apr 9, 1997
Inventor
Neal Katz
Assignee (at issue)
Richco Inc.
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.