Granted Patent
Utility
US 5,666,134 · App. 08/241,697
Electromagnetic shutter
Inventor:
John Browne
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: May 12, 1994
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.