Granted Patent
Utility
US 4,414,523 · App. 06/299,865
Encapsulated magnet for magnetic drive
Inventor:
Ferdinandus A. Pieters
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Sep 4, 1981
Inventor
Ferdinandus A. Pieters
Assignee (at issue)
Micropump, 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.