Granted Patent
Utility
US 5,457,997 · App. 08/240,727
Laser ultrasonic detection method and apparatus therefor
Inventors:
Karzueru Naruo, Keisho Arai
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: May 11, 1994
Inventors
Karzueru Naruo
Keisho Arai
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.