Granted Patent
Utility
US 6,427,057 · App. 09/737,320
Image-forming machine with a pulse densitometer
Inventors:
William A. Hameister, Kenneth P. Friedrich
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Dec 14, 2000
Inventors
William A. Hameister
Kenneth P. Friedrich
Assignee (at issue)
Heidelberger Druckmaschinen 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.