Granted Patent
Utility
US 6,423,928 · App. 09/690,161
Gas assisted laser cutting of thin and fragile materials
Inventor:
Bernhard P. Piwczyk
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Oct 12, 2000
Inventor
Bernhard P. Piwczyk
Assignee (at issue)
ASE Americas, Inc.
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.