Granted Patent
Utility
US 4,237,989 · App. 06/038,328
Capacitive load cell and method of manufacture
Inventor:
Howard Lewis
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: May 11, 1979
Inventor
Howard Lewis
Assignee (at issue)
National Controls Corporation
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.