Granted Patent
Utility
US 5,216,421 · App. 07/588,020
Indicator for small watercraft
Inventors:
Ryoji Sawada, Satoshi Yamamoto
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Sep 25, 1990
Inventors
Ryoji Sawada
Satoshi Yamamoto
Assignee (at issue)
Moriyama 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.