Granted Patent
Utility
US 5,408,055 · App. 08/140,841
Cordless transducer phase reference and data communication apparatus and method for digitizers
Inventors:
Andrew Mitchell Harris, James S. Watson
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Oct 25, 1993
Inventors
Andrew Mitchell Harris
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.