Granted Patent
Utility
US 6,239,406 · App. 09/280,827
Laser beam machining apparatus
Inventors:
Yoshimi Onoma, Masato Edahiro
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Mar 30, 1999
Inventors
Yoshimi Onoma
Masato Edahiro
Assignee (at issue)
NEC 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.