Granted Patent
Utility
US 5,653,259 · App. 08/539,496
Valve block
Inventor:
Paul O. Ramstad
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Oct 6, 1995
Inventor
Paul O. Ramstad
Assignee (at issue)
APPLIED BIOSYSTEMS, LLC
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.