Granted Patent
Utility
US 4,848,058 · App. 07/209,551
Recreation surface and tile interlocking scheme
Inventor:
Paul A. Mullen
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Jun 21, 1988
Inventor
Paul A. Mullen
Assignee (at issue)
Carlisle Tire and Rubber Company, 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.