Granted Patent
Utility
US 4,742,397 · App. 06/819,128
System and method for adjusting image brightness in electronic printer
Inventors:
Guillermo S. Ferla, Dean Gross
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Jan 16, 1986
Inventors
Guillermo S. Ferla
Dean Gross
Assignee (at issue)
Polaroid 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.