Granted Patent
Utility
US 4,901,523 · App. 07/294,442
Rotor for gas turbine engine
Inventor:
David S. Huelster
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jan 9, 1989
Inventor
David S. Huelster
Assignee (at issue)
General Motors LLC
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.