Granted Patent
Utility
US 5,984,175 · App. 08/919,981
Device and process for detecting and identifying wearable user identification units
Inventor:
Hans Popp
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Aug 28, 1997
Inventor
Hans Popp
Assignee (at issue)
DRAGERWERK AKTIEGESELLSCHAFT
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.