Granted Patent
Utility
US 3,972,644 · App. 05/544,161
Vane control arrangement for variable area turbine nozzle
Inventor:
Roger W. Johnson
Patented Case
View Patent ↗
Granted: Aug 3, 1976
Filed: Jan 27, 1975
Inventor
Roger W. Johnson
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.