Granted Patent
Utility
US 4,242,046 · App. 05/915,790
Fan spider with rake angle
Inventors:
Joseph V. Matucheski, Clifford S. L. Yee, Michael T. Spellman, Donald J. Hartley, William D. Barton
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Jun 15, 1978
Inventors
Joseph V. Matucheski
Clifford S. L. Yee
Michael T. Spellman
Donald J. Hartley
William D. Barton
Assignee (at issue)
Wallace Murray Corporation
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.