Granted Patent
Utility
US 4,348,188 · App. 06/231,863
Playground design kit and method of using the same
Inventor:
Paul W. Ahrens
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Feb 5, 1981
Inventor
Paul W. Ahrens
Assignee (at issue)
Miracle Recreation Equipment Company
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.