IP Library Granted Patent US 6,580,469
Granted Patent Utility
US 6,580,469 · App. 09/446,881

Projection device

Inventors: Gerd Rieche, Dietrich Schmidt, Juergen Pudenz, Hans-Juergen Meissner, Hans-Joachim Stoehr, Eberhard Piehler, Rainer Schnell
Patented Case View Patent ↗
Granted: Jun 17, 2003 Filed: Dec 28, 1999
Inventors
Gerd Rieche
Dietrich Schmidt
Juergen Pudenz
Hans-Juergen Meissner
Hans-Joachim Stoehr
Eberhard Piehler
Rainer Schnell
Assignee (at issue)
Carl Zeiss Jena 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.

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Quick Facts
Patent No.
US 6,580,469
App. No.
09/446,881
Filed
1999-12-28
Granted
2003-06-17
Kind
B1