Granted Patent
Utility
US 6,447,491 · App. 09/336,471
Rolling seal suction pressure regulator, apparatus and system for draining a body cavity and methods related thereto
Inventor:
Kevin M. Lord
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Jun 18, 1999
Inventor
Kevin M. Lord
Assignee (at issue)
Genzyme Corporation
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.