Granted Patent
Utility
US 4,967,919 · App. 07/375,796
Blood collection tube safety cap
Inventor:
Stephen B. Earhart
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Jul 5, 1989
Inventor
Stephen B. Earhart
Assignee (at issue)
Sherwood Medical 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.