Granted Patent
Utility
US 4,649,502 · App. 06/665,974
Process and apparatus for evaluating printing quality and for regulating the ink feed controls in an offset printing machine
Inventors:
Guido Keller, Andreas Spiess, Hans Ott, Rolf Boegli
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Oct 29, 1984
Inventors
Guido Keller
Andreas Spiess
Hans Ott
Rolf Boegli
Assignee (at issue)
Gretag 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.