Granted Patent
Utility
US 6,464,263 · App. 09/525,374
Connector for a corrugated pipe with locking portion
Inventors:
Ernst Schwarz, Roger Huppi
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Mar 15, 2000
Inventors
Ernst Schwarz
Roger Huppi
Assignee (at issue)
PMA CONSULTANTS LLC
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.