Granted Patent
Utility
US 6,632,203 · App. 09/862,076
Sampling port for a drainage device
Inventors:
David Rork Swisher, Jacky S. Yam
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: May 21, 2001
Inventors
David Rork Swisher
Jacky S. Yam
Assignee (at issue)
SHERWOOD SERVICES AG
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.