Granted Patent
Utility
US 6,654,576 · App. 10/103,209
System for and method of reducing toner seal leakage by the introduction of a step groove in the developer roller
Inventor:
Patrick S. Dougherty
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Mar 21, 2002
Inventor
Patrick S. Dougherty
Assignee (at issue)
Hewlett-Packard Development Company, L.P.
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.