Granted Patent
Utility
US 5,421,064 · App. 08/154,729
Filaments dispersing device
Inventors:
Hiroshi Ishii, Katsuya Hata, Yoshinori Kobayashi
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Nov 19, 1993
Inventors
Hiroshi Ishii
Katsuya Hata
Yoshinori Kobayashi
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.