Granted Patent
Utility
US 5,877,459 · App. 08/826,506
Electrostatic pen apparatus and method having an electrically conductive and flexible tip
Inventor:
James S. Prater
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Apr 11, 1997
Inventor
James S. Prater
Assignee (at issue)
Hyundai Electronics America
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.