Granted Patent
Utility
US 6,424,330 · App. 09/303,318
Electro-optic display device with DC offset correction
Inventor:
Mark Thomas Johnson
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Apr 30, 1999
Inventor
Mark Thomas Johnson
Assignee (at issue)
KONINKLIJKE PHILIPS ELECTRONICS NV
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.