Granted Patent
Utility
US 4,579,711 · App. 06/464,478
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Inventors:
Yoshitsugu Mishima, Naoaki Takahashi, Kiyozumi Hayashi, Kazushige Domoto
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Feb 7, 1983
Inventors
Yoshitsugu Mishima
Naoaki Takahashi
Kiyozumi Hayashi
Kazushige Domoto
Assignee (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.