Granted Patent
Utility
US 5,607,364 · App. 08/361,141
Polymer damped tubular shafts
Inventors:
Michael W. Hedrick, Douglas C. Winfield
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Dec 21, 1994
Inventors
Michael W. Hedrick
Douglas C. Winfield
Assignee (at issue)
BLACK & DECKER INC.
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.