Granted Patent
Utility
US 6,427,800 · App. 09/704,607
Ear plug and method of manufacturing an ear plug
Inventors:
Per Hiselius, Lars B. Nilsson
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Nov 3, 2000
Inventors
Per Hiselius
Lars B. Nilsson
Assignee (at issue)
Dalloz Safety AB
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.