Granted Patent
Utility
US 5,628,306 · App. 08/230,983
Respiratory manifold with accessory access port
Inventor:
Kok-Hiong Kee
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Apr 21, 1994
Inventor
Kok-Hiong Kee
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.