Granted Patent
Utility
US 6,744,494 · App. 10/012,989
Continuously adjustable neutral density area filter
Inventors:
John Maltabes, Karl Mautz, Alain Charles
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Dec 7, 2001
Inventors
John Maltabes
Karl Mautz
Alain Charles
Assignee (at issue)
Motorola, Inc.
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.