Granted Patent
Utility
US 4,871,694 · App. 07/097,707
Cellular ceramic material and method of production thereof
Inventor:
David J. Legare
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Sep 17, 1987
Inventor
David J. Legare
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.