Granted Patent
Utility
US 4,297,076 · App. 06/046,771
Wind turbine
Inventors:
Robert E. Donham, Richard L. Heimbold
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Jun 8, 1979
Inventors
Robert E. Donham
Richard L. Heimbold
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.