Granted Patent
Utility
US 4,806,032 · App. 07/048,190
Conical vent containing capillary bore
Inventors:
Brian D. Gragg, Jon Fong, Arthur K. Wilson
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: May 11, 1987
Inventors
Brian D. Gragg
Jon Fong
Arthur K. Wilson
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.