Granted Patent
Utility
US 6,003,248 · App. 08/907,612
Heatable liner for footwear
Inventor:
Kurt Hilgarth
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Aug 8, 1997
Inventor
Kurt Hilgarth
Assignee (at issue)
Fancyform Design Engineering
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.