Granted Patent
Utility
US 4,335,997 · App. 06/112,446
Stress resistant hybrid radial turbine wheel
Inventors:
Bruce A. Ewing, Leonard C. Lindgren
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Jan 16, 1980
Inventors
Bruce A. Ewing
Leonard C. Lindgren
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.