Granted Patent
Utility
US 6,089,302 · App. 08/688,825
Extensible doorway barrier
Inventor:
Merrie Britt
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jul 31, 1996
Inventor
Merrie Britt
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.