Granted Patent
Utility
US 4,521,038 · App. 06/496,558
Safety connector for flexible tube device
Inventor:
David E. Cerny
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: May 20, 1983
Inventor
David E. Cerny
Assignee (at issue)
Respiratory Care, Inc.
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.