Granted Patent
Utility
US 5,052,891 · App. 07/492,009
Connection for gas turbine engine rotor elements
Inventor:
Philip Burkholder
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Mar 12, 1990
Inventor
Philip Burkholder
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.