Granted Patent
Utility
US 4,837,997 · App. 07/219,144
Sealing System Including T-joint Corner Piece
Inventor:
Alan Zeilinger
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Jul 15, 1988
Inventor
Alan Zeilinger
Assignee (at issue)
Magic American 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.