Granted Patent
Utility
US 4,128,325 · App. 05/802,061
Automatic density measurement calibration for photographic replenishment system
Inventors:
Theodore A. Melander, Ralph L. Charnley
Patented Case
View Patent ↗
Granted: Dec 5, 1978
Filed: May 31, 1977
Inventors
Theodore A. Melander
Ralph L. Charnley
Assignee (at issue)
Pako Corporation
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.