Granted Patent
Utility
US 6,825,440 · App. 10/141,911
Laser beam machining method and apparatus
Inventors:
Kazuyoshi Ohta, Naoshige Sasano
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: May 10, 2002
Inventors
Kazuyoshi Ohta
Naoshige Sasano
Assignee (at issue)
Moritax Corporation
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.