Granted Patent
Utility
US 4,330,210 · App. 06/069,926
Spectrophotometer capable of correcting a dark current
Inventors:
Noriyoshi Hashimoto, Mikio Ito, Kikuo Tamura
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Aug 27, 1979
Inventors
Noriyoshi Hashimoto
Mikio Ito
Kikuo Tamura
Assignee (at issue)
Nippon Kogaku K.K.
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.