Granted Patent
Utility
US 5,117,119 · App. 07/668,490
Auto-ranging film densitometer
Inventors:
Paul C. Schubert, Richard R. Lemberger
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Mar 13, 1991
Inventors
Paul C. Schubert
Richard R. Lemberger
Assignee (at issue)
Minnesota Mining and Manufacturing 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.