Granted Patent
Utility
US 5,357,334 · App. 07/992,647
Spectroanalyzer correcting for deterioration of transmissibility
Inventors:
Yoichi Ishiguro, Haruhiko Aikawa, Minoru Watanabe, Yoshiaki Ichige, Fumitoshi Okamoto
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Dec 18, 1992
Inventors
Yoichi Ishiguro
Haruhiko Aikawa
Minoru Watanabe
Yoshiaki Ichige
Fumitoshi Okamoto
Assignees (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.