Granted Patent
Utility
US 5,839,236 · App. 08/871,631
Curtain wall integral drip system
Inventor:
John R. Frey
Patented Case
View Patent ↗
Granted: Nov 24, 1998
Filed: Jun 9, 1997
Inventor
John R. Frey
Assignee (at issue)
International Aluminum Corporation
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.