Granted Patent
Utility
US 6,558,538 · App. 09/845,629
Device for preventing the clogging of a drainage system
Inventors:
Vincent Scuilla, Peter A. Vandenbergh, David E. Glendening, Perry T. Patterson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Apr 30, 2001
Inventors
Vincent Scuilla
Peter A. Vandenbergh
David E. Glendening
Perry T. Patterson
Assignee (at issue)
Osprey Biotechnics, 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.