Granted Patent
Utility
US 6,555,246 · App. 09/889,355
Method of producing a sound-absorbent insulating element and insulating element produced according to this method
Inventor:
Evelyn Zwick
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Jul 17, 2001
Inventor
Evelyn Zwick
Assignee (at issue)
Rieter Automotive (International) AG
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.