Granted Patent
Utility
US 4,469,489 · App. 06/536,111
Coated composite modified silicon aluminum oxynitride cutting tools
Inventors:
Vinod K. Sarin, Sergej-Tomislav Buljan
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Sep 26, 1983
Inventors
Vinod K. Sarin
Sergej-Tomislav Buljan
Assignee (at issue)
GTE Laboratories Incorporated
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.