Granted Patent
Utility
US 4,237,421 · App. 05/952,705
Single-electrode capacitance touchpad sensor systems
Inventor:
Wesley K. Waldron
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Oct 19, 1978
Inventor
Wesley K. Waldron
Assignee (at issue)
General Electric Company
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.