Granted Patent
Utility
US 4,741,561 · App. 06/704,889
Remotely monitored seal in a connection joint
Inventors:
Eiji Morita, Noritaka Hashimoto, Akira Wadamoto
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Feb 25, 1985
Inventors
Eiji Morita
Noritaka Hashimoto
Akira Wadamoto
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.