Granted Patent
Utility
US 6,139,519 · App. 09/217,314
Method and apparatus for detecting tube occlusion
Inventor:
Robert Lewis Blythe
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Dec 21, 1998
Inventor
Robert Lewis Blythe
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.