Granted Patent
Utility
US 6,709,732 · App. 09/542,234
Web-type floor covering and method for its manufacture
Inventors:
Gerhard Graab, Klaus Heckel, Dieter Rischer, Gerhard Heidecke
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Apr 4, 2000
Inventors
Gerhard Graab
Klaus Heckel
Dieter Rischer
Gerhard Heidecke
Assignee (at issue)
Firma Carl Freudenberg
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.