Granted Patent
Utility
US 6,173,483 · App. 09/364,314
Apparatus for manufacturing drainage line units and associated methods
Inventors:
Michael Houck, Thomas K. Weaver
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Jul 30, 1999
Inventors
Michael Houck
Thomas K. Weaver
Assignee (at issue)
EZflow L.P.
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.