Granted Patent
Utility
US 4,227,620 · App. 06/016,156
Specimen collecting tube
Inventor:
Hugh T. Conway
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Feb 28, 1979
Inventor
Hugh T. Conway
Assignee (at issue)
BECTON, DICKINSON AND COMPANY
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.