Granted Patent
Utility
US 5,965,638 · App. 08/925,890
Structural mat matrix
Inventor:
Darrell Heine
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Sep 8, 1997
Inventor
Darrell Heine
Assignee (at issue)
Elk Corporation of Dallas
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.