Granted Patent
Utility
US 5,124,509 · App. 07/643,576
Digitizer with capacitive and inductive coupling
Inventors:
Jason J. Hoendervoogt, James S. Watson
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Jan 15, 1991
Inventors
Jason J. Hoendervoogt
James S. Watson
Assignee (at issue)
CalComp Inc.
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.