Granted Patent
Utility
US 5,353,166 · App. 07/957,524
Mounting system for optical annulus in lens assembly
Inventors:
Keith Ernest Hanford, Edward A. Johnson
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Oct 6, 1992
Inventors
Keith Ernest Hanford
Edward A. Johnson
Assignee (at issue)
Federal Signal 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.