Granted Patent
Utility
US 6,632,003 · App. 09/833,060
Signal apparatus
Inventors:
Erich Marquardt, Steffen Rudischhauser, Reinhard Mordau
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Apr 12, 2001
Inventors
Erich Marquardt
Steffen Rudischhauser
Reinhard Mordau
Assignee (at issue)
WERMA Signaltechnik GmbH + Co. KG
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.