Granted Patent
Utility
US 4,546,939 · App. 06/584,699
Energy efficient ECS powered by a variable voltage/variable frequency power system
Inventor:
Michael Cronin
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Feb 29, 1984
Inventor
Michael Cronin
Assignee (at issue)
Lockheed Corporation
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.