Granted Patent
Utility
US 4,469,407 · App. 06/346,930
Laser apodizing filter
Inventors:
James J. Cowan, Andrew B. Holland
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Feb 8, 1982
Inventors
James J. Cowan
Andrew B. Holland
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.