Granted Patent
Utility
US 6,014,525 · App. 09/203,477
Photometric device
Inventors:
Tadahisa Ohkura, Isamu Hirai
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Dec 2, 1998
Inventors
Tadahisa Ohkura
Isamu Hirai
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.