Granted Patent
Utility
US 6,116,523 · App. 09/308,060
Pressure-compensating drip irrigation hose and method for its manufacture
Inventors:
Jaime Cabahug, Que Thuy Tran, David L. Teegardin, Michael DeFrank
Patented Case
View Patent ↗
Granted: Sep 12, 2000
Filed: Dec 6, 1999
Inventors
Jaime Cabahug
Que Thuy Tran
David L. Teegardin
Michael DeFrank
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.