Granted Patent
Utility
US 4,598,239 · App. 06/566,184
Circuit for regulating the rpm and phase of a motor
Inventor:
Heinrich Cap
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Dec 28, 1983
Inventor
Heinrich Cap
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.