Granted Patent
Utility
US 6,351,920 · App. 09/299,234
Ceiling module perimeter seal
Inventors:
Larry D. Hopkins, Craig S. Ludwig
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Apr 22, 1999
Inventors
Larry D. Hopkins
Craig S. Ludwig
Assignee (at issue)
Cleanpak International
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.