Granted Patent
Utility
US 4,250,893 · App. 06/013,244
Sample collection device
Inventor:
Fred K. White
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Feb 21, 1979
Inventor
Fred K. White
Assignee (at issue)
American Hospital Supply 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.