Granted Patent
Utility
US 5,439,589 · App. 08/239,736
Sealing means for slide plate screen changer
Inventor:
Timothy W. Whitman
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: May 9, 1994
Inventor
Timothy W. Whitman
Assignee (at issue)
Trafalgar House Company
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.