Granted Patent
Utility
US 6,442,767 · App. 09/482,388
Safety helmet
Inventors:
Rudiger Meckes, Purushotham Mahavadi, Siegfried Zimprich
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Jan 12, 2000
Inventors
Rudiger Meckes
Purushotham Mahavadi
Siegfried Zimprich
Assignee (at issue)
Dräger Aerospace GmbH
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.