Granted Patent
Utility
US 4,407,216 · App. 06/263,562
Frame system for kayak
Inventor:
William E. Masters
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: May 14, 1981
Inventor
William E. Masters
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.