Granted Patent
Utility
US 4,795,403 · App. 06/900,021
Torsional sleeve coupling
Inventors:
Charles F. Heine, Mark Charles Barnholt, Donald E. Hobson, Richard L. Pifer
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Aug 25, 1986
Inventors
Charles F. Heine
Mark Charles Barnholt
Donald E. Hobson
Richard L. Pifer
Assignee (at issue)
DANA LIMITED
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.