Granted Patent
Utility
US 4,769,310 · App. 07/008,818
Laser marking of ceramic materials, glazes, glass ceramics and glasses
Inventors:
Heinrich Gugger, Fritz Herren, Manfred Hofmann, Andre Pugin
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jan 30, 1987
Inventors
Heinrich Gugger
Fritz Herren
Manfred Hofmann
Andre Pugin
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.