Granted Patent
Utility
US 4,339,665 · App. 06/123,211
Apparatus for detecting displacement of optical image
Inventors:
Ken Utagawa, Hiroshi Shirasu
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Feb 21, 1980
Inventors
Ken Utagawa
Hiroshi Shirasu
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.