Granted Patent
Utility
US 5,337,077 · App. 07/855,063
Electromagnetic shutter
Inventor:
John Browne
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Mar 20, 1992
Inventor
John Browne
Assignee (at issue)
Mark IV Industries Corp.
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.