Granted Patent
Utility
US 5,645,974 · App. 08/635,814
Process for the production of printing plates
Inventors:
Katsuyuki Ohta, Toshiya Takagi, Toshimi Aoyama
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Apr 22, 1996
Inventors
Katsuyuki Ohta
Toshiya Takagi
Toshimi Aoyama
Assignees (at issue)
Tokyo Ohka Kogyo, K.K.
Ciba-Geigy
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.