Granted Patent
Utility
US 5,221,971 · App. 07/616,786
Area modulation printing apparatus
Inventors:
Janet Allen, Daniel P. Bybell, Dana F. Schuh, Jay Thornton
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Nov 21, 1990
Inventors
Janet Allen
Daniel P. Bybell
Dana F. Schuh
Jay Thornton
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.