Granted Patent
Utility
US 4,259,697 · App. 05/939,053
Method for improved reproduction of edges formed by engraving of screened printing forms
Inventor:
Juergen Doelves
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Sep 1, 1978
Inventor
Juergen Doelves
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.