Granted Patent
Utility
US 6,551,215 · App. 09/451,255
Climbing structure
Inventor:
Donald W. Gordon
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Nov 29, 1999
Inventor
Donald W. Gordon
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.