Granted Patent
Utility
US 4,269,059 · App. 06/021,810
Dosimeter having constant flow pump
Inventor:
William Brent Baker
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Mar 19, 1979
Inventor
William Brent Baker
Assignee (at issue)
E.I. DU PONT DE NEMOURS 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.