Granted Patent
Utility
US 5,134,253 · App. 07/714,675
Digitizer employing loopback conductor pattern using rotation sequencing
Inventor:
Dana Doubrava
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Jun 13, 1991
Inventor
Dana Doubrava
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.