Granted Patent
Utility
US 6,820,923 · App. 09/631,211
Sound absorption system for automotive vehicles
Inventor:
Lothar Josef Bock
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Aug 3, 2000
Inventor
Lothar Josef Bock
Assignee (at issue)
L&L Products, Inc.
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.