Granted Patent
Utility
US 4,693,677 · App. 06/854,897
Flat die neck-in control device
Inventors:
Hiromi Shigemoto, Akio Yamamoto, Iwatoshi Suzuki
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: Apr 23, 1986
Inventors
Hiromi Shigemoto
Akio Yamamoto
Iwatoshi Suzuki
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.