Granted Patent
Utility
US 4,487,255 · App. 06/527,779
Control for a fluid-driven fan
Inventors:
Donald L. Bianchetta, Robert W. White
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Dec 17, 1981
Inventors
Donald L. Bianchetta
Robert W. White
Assignee (at issue)
Caterpillar Tractor Co.
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.