Granted Patent
Utility
US 5,902,368 · App. 09/007,408
Method for the heat-softened severance of glass tubes or plates
Inventors:
André Witzmann, Ulla Trinks
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Jan 15, 1998
Inventors
André Witzmann
Ulla Trinks
Assignee (at issue)
Schott Glaswerke
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.