Granted Patent
Utility
US 5,600,358 · App. 08/085,865
Ink pen having a hydrophobic barrier for controlling ink leakage
Inventors:
Marc A. Baldwin, Ella M. Duyck, Lawrence Plotkin
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Jun 30, 1993
Inventors
Marc A. Baldwin
Ella M. Duyck
Lawrence Plotkin
Assignee (at issue)
Hewlett-Packard 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.