Granted Patent
Utility
US 6,821,607 · App. 10/382,514
Acoustically effective foil stack for a vehicle heat shield
Inventors:
Evelyn Zwick, Alexander Wildhaber
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Mar 7, 2003
Inventors
Evelyn Zwick
Alexander Wildhaber
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.