Granted Patent
Utility
US 6,451,239 · App. 09/638,220
Process of making a hook fastener using radio frequency heating
Inventor:
Robert B. Wilson
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Aug 14, 2000
Inventor
Robert B. Wilson
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.