Granted Patent
Utility
US 4,950,862 · App. 07/420,599
Laser machining apparatus using focusing lens-array
Inventor:
Toshikazu Kajikawa
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Oct 12, 1989
Inventor
Toshikazu Kajikawa
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.