Granted Patent
Utility
US 5,618,993 · App. 08/575,467
Ultrasonic detection apparatus and method for detecting acoustic emission
Inventors:
Kazuo Matsumoto, Haruhiko Ueno, Kenji Shimada
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Dec 20, 1995
Inventors
Kazuo Matsumoto
Haruhiko Ueno
Kenji Shimada
Assignee (at issue)
Zexel GmbH
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.