Granted Patent
Utility
US 5,538,573 · App. 08/348,588
Automatic valve insertion method and apparatus therefor
Inventor:
Brent Anderson
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Dec 2, 1994
Inventor
Brent Anderson
Assignee (at issue)
CTI INDUSTRIES CORP.
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.