Granted Patent
Utility
US 4,229,474 · App. 06/042,983
Breakage resistant V-grooved <100> silicon substrates
Inventor:
Alan L. Harrington
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: May 25, 1979
Inventor
Alan L. Harrington
Assignee (at issue)
TRW Limited
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.