Granted Patent
Utility
US 6,345,684 · App. 09/568,870
Checkable earplug
Inventor:
Howard S. Leight
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: May 9, 2000
Inventor
Howard S. Leight
Assignee (at issue)
Bacou USA Safety, 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.