Granted Patent
Utility
US 5,865,377 · App. 08/850,407
Drip irrigation hose and method for its manufacture
Inventors:
Michael DeFrank, David Marchetti, David L. Teegardin
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: May 2, 1997
Inventors
Michael DeFrank
David Marchetti
David L. Teegardin
Assignee (at issue)
T-SYSTEMS INTERNATIONAL GMBH
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.