Granted Patent
Utility
US 6,024,121 · App. 09/219,986
Check valve
Inventor:
Bo Anderson
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: Dec 23, 1998
Inventor
Bo Anderson
Assignee (at issue)
FLOMATIC 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.