Granted Patent
Utility
US 5,191,680 · App. 07/748,806
Filament threading in an air gun for producing nonwoven fabrics
Inventors:
Akira Kaneko, Nobuo Higashiya, Hiroyuki Hamasuna
Patented Case
View Patent ↗
Granted: Mar 9, 1993
Filed: Aug 22, 1991
Inventors
Akira Kaneko
Nobuo Higashiya
Hiroyuki Hamasuna
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.