Granted Patent
Utility
US 6,719,009 · App. 10/080,924
Composite material piping system
Inventors:
David R. Bissen, Lawrence P. Schmidt, Brian E. Spencer, Leo B. Willner
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Feb 22, 2002
Inventors
David R. Bissen
Lawrence P. Schmidt
Brian E. Spencer
Leo B. Willner
Assignee (at issue)
Schwing America, 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.