Granted Patent
Utility
US 4,381,895 · App. 06/125,549
Method and apparatus for automatic flow-through digital refractometer
Inventors:
Leonard A. Hughes, Evan R. Flavell, Benjamin C. Willman
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: Feb 28, 1980
Inventors
Leonard A. Hughes
Evan R. Flavell
Benjamin C. Willman
Assignee (at issue)
Biovation, LLC
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.