Granted Patent
Utility
US 5,467,683 · App. 08/253,250
Actuating drive for a control valve
Inventors:
Heinz Frey, Kamil Prochazka, Franz Suter
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Jun 2, 1994
Inventors
Heinz Frey
Kamil Prochazka
Franz Suter
Assignee (at issue)
ABB Management AG
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.