Granted Patent
Utility
US 5,220,136 · App. 07/798,664
Contact touchscreen with an improved insulated spacer arrangement
Inventor:
Joel C. Kent
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Nov 26, 1991
Inventor
Joel C. Kent
Assignee (at issue)
Elographics, 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.