Granted Patent
Utility
US 6,815,042 · App. 10/097,171
Floor covering
Inventors:
Gerhard Graab, Klaus Heckel
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Mar 12, 2002
Inventors
Gerhard Graab
Klaus Heckel
Assignee (at issue)
CARL FREUDENBERG KG
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.