Granted Patent
Utility
US 4,231,069 · App. 05/903,878
Method and apparatus for producing image combinations
Inventors:
Klaus Wellendorf, Ruediger Sommer
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: May 8, 1978
Inventors
Klaus Wellendorf
Ruediger Sommer
Assignee (at issue)
Dr. Ing. Rudolf Hell GmbH
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.