Granted Patent
Utility
US 5,274,976 · App. 07/666,695
Window unit with decorative grille assembly
Inventor:
E. Wayne Burkhart
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Mar 8, 1991
Inventor
E. Wayne Burkhart
Assignee (at issue)
Vinyl Technology, Inc.
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.