Granted Patent
Utility
US 6,183,018 · App. 09/068,984
Data carrier with optically variable color
Inventors:
Eckhard Braun, Reinhard Plaschka
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Sep 21, 1998
Inventors
Eckhard Braun
Reinhard Plaschka
Assignee (at issue)
GIESECKE & DEVRIENT 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.