Granted Patent
Utility
US 4,493,066 · App. 06/526,498
Seismosensitive device
Inventors:
Susumu Ubukata, Yasukazu Mizutani
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Aug 25, 1983
Inventors
Susumu Ubukata
Yasukazu Mizutani
Assignee (at issue)
Susumu Ubukata
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.