Granted Patent
Utility
US 6,420,678 · App. 09/240,058
Method for separating non-metallic substrates
Inventor:
Brian Hoekstra
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jan 29, 1999
Inventor
Brian Hoekstra
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.