Granted Patent
Utility
US 5,238,456 · App. 07/886,156
Reinforced swing seat
Inventor:
Tony Chang
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: May 21, 1992
Inventor
Tony Chang
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.