Granted Patent
Utility
US 5,574,475 · App. 08/138,366
Signal driver circuit for liquid crystal displays
Inventors:
Michael Callahan, Christopher A. Ludden
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Oct 18, 1993
Inventors
Michael Callahan
Christopher A. Ludden
Assignee (at issue)
Crystal Semiconductor Corp.
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.