Granted Patent
Utility
US 5,630,304 · App. 08/703,366
Adjustable interlock floor tile
Inventor:
John R. Austin
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Aug 26, 1996
Inventor
John R. Austin
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.