Granted Patent
Utility
US 6,581,633 · App. 09/948,978
Check valve and method of fabrication
Inventor:
Bo Andersson
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Sep 7, 2001
Inventor
Bo Andersson
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.