Granted Patent
Utility
US 4,398,833 · App. 06/176,502
Electronic timepiece
Inventor:
Kojiro Tanaka
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Aug 8, 1980
Inventor
Kojiro Tanaka
Assignee (at issue)
Kabushiki Kaisha Daini Seikosha
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.