Granted Patent
Utility
US 4,928,045 · App. 07/334,539
Circuit arrangement for generating a measurement signal associated with the frequency of an alternating current signal
Inventor:
Benno Doemen
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Apr 7, 1989
Inventor
Benno Doemen
Assignee (at issue)
Papst Motoren GmbH & Co KG
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.