Granted Patent
Utility
US 6,404,420 · App. 09/321,186
Electronic device having a rotary switch and a display screen
Inventors:
Bernhard Klein, Axel Hengst
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: May 27, 1999
Inventors
Bernhard Klein
Axel Hengst
Assignee (at issue)
Mannesmann VDO AG
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.