Granted Patent
Utility
US 5,930,321 · App. 09/056,143
Head assembly
Inventors:
Alexander W. Harkness, Michael F. Hankinson
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Apr 7, 1998
Inventors
Alexander W. Harkness
Michael F. Hankinson
Assignee (at issue)
GROUP CBS, 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.