Granted Patent
Utility
US 4,973,506 · App. 07/263,282
Composite plate for the facing of building surfaces
Inventors:
Rudolf Bauer, Peter H. Lynam
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Oct 27, 1988
Inventors
Rudolf Bauer
Peter H. Lynam
Assignee (at issue)
Ciba-Geigy
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.