Granted Patent
Utility
US 5,188,123 · App. 07/819,614
Hearing protective earplug having alternative modes of insertion
Inventor:
Ross Gardner, Jr.
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Jan 9, 1992
Inventor
Ross Gardner, Jr.
Assignee (at issue)
Cabot Safety 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.