Granted Patent
Utility
US 6,296,016 · App. 09/521,538
Double obturator valve
Inventors:
Christopher Jack Parker, Peter Alfred Gorman
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Mar 8, 2000
Inventors
Christopher Jack Parker
Peter Alfred Gorman
Assignee (at issue)
BTR plc
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.