Granted Patent
Utility
US 4,506,218 · App. 06/224,126
Condition sensing arrangement for ac machines
Inventors:
Fred A. Brown, Alan F. Grouse
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Jan 12, 1981
Inventors
Fred A. Brown
Alan F. Grouse
Assignee (at issue)
Rotron, 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.