Granted Patent
Utility
US 5,293,023 · App. 07/030,537
Laser irradiation nozzle and laser apparatus using the same
Inventors:
Kohichi Haruta, Yuichiro Terashi
Patented Case
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Granted: Mar 8, 1994
Filed: Mar 12, 1993
Inventors
Kohichi Haruta
Yuichiro Terashi
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.