Granted Patent
Utility
US 6,572,242 · App. 09/832,801
Illuminator for a signal lamp
Inventors:
Erich Marquardt, Siegfried Neumann, Juergen Marquardt, Dirk Rothhaas
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Apr 12, 2001
Inventors
Erich Marquardt
Siegfried Neumann
Juergen Marquardt
Dirk Rothhaas
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.