Granted Patent
Utility
US 4,952,979 · App. 07/331,666
Isorunning-counterrunning developer station for an electrophotographic means
Inventors:
Rainer Koefferlein, Bernhard Schlageter, Erich Baier
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Mar 22, 1989
Inventors
Rainer Koefferlein
Bernhard Schlageter
Erich Baier
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.