Granted Patent
Utility
US 6,428,232 · App. 09/837,482
Roller ball pen with adjustable spring tension
Inventors:
Bernard J. McCauley, Ryan S. Eddington, Michael Huneke
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Apr 19, 2001
Inventors
Bernard J. McCauley
Ryan S. Eddington
Michael Huneke
Assignee (at issue)
SOCIETE BIC
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.