Granted Patent
Utility
US 6,629,340 · App. 10/117,243
Acoustic underlayment for pre-finished laminate floor system
Inventors:
Robert Dale, James Schaeffer
Patented Case
View Patent ↗
Granted: Oct 7, 2003
Filed: Apr 5, 2002
Inventors
Robert Dale
James Schaeffer
Assignee (at issue)
Polytec GmbH
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.