Granted Patent
Utility
US 5,539,488 · App. 08/403,228
Rotary shutter
Inventors:
Paul Erickson, David J. Shelander, Paul A. Richardson, John Evers
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Mar 16, 1995
Inventors
Paul Erickson
David J. Shelander
Paul A. Richardson
John Evers
Assignee (at issue)
Lucht, 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.