Granted Patent
Utility
US 5,086,415 · App. 07/637,531
Method for determining source region of volcanic tremor
Inventors:
Kozo Takahashi, Yukio Fujinawa
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Jan 4, 1991
Inventors
Kozo Takahashi
Yukio Fujinawa
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.