Granted Patent
Utility
US 5,307,145 · App. 07/928,729
Process and apparatus for measuring small quantities of light
Inventors:
Paul Schenkel, Beat Frick
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Aug 13, 1992
Inventors
Paul Schenkel
Beat Frick
Assignee (at issue)
Gretag Imaging AG
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.