Granted Patent
Utility
US 4,238,161 · App. 06/014,850
Spotting device
Inventor:
Kazuo Morohashi
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Feb 26, 1979
Inventor
Kazuo Morohashi
Assignees (at issue)
Nippon Kogaku K.K.
Shachihata Industrial Co., Ltd.
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.