Granted Patent
Utility
US 4,922,130 · App. 07/198,941
High performance track/hold for a digital multimeter
Inventor:
Ronald L. Swerlein
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: May 26, 1988
Inventor
Ronald L. Swerlein
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.