Granted Patent
Utility
US 4,877,236 · App. 06/681,587
Rotating playground equipment assembly
Inventor:
William H. Shannon
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Dec 14, 1984
Inventor
William H. Shannon
Assignee (at issue)
Gametime
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.