Granted Patent
Utility
US 4,909,629 · App. 07/215,856
Light interferometer
Inventors:
Takashi Yokokura, Nobuo Hori, Hiroaki Shimozono, Satoru Niimura
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Jul 6, 1988
Inventors
Takashi Yokokura
Nobuo Hori
Hiroaki Shimozono
Satoru Niimura
Assignee (at issue)
TOPCON CORPORATION
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.