Granted Patent
Utility
US 4,244,646 · App. 06/012,003
Device and method for producing a number of copies by electrophotographic techniques
Inventors:
Eberhard Bayer, Karl Kempter
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Feb 14, 1979
Inventors
Eberhard Bayer
Karl Kempter
Assignee (at issue)
Siemens Aktiengesellschaft
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.