Granted Patent
Utility
US 4,818,879 · App. 07/040,677
Positioning and machining apparatus having a scanner for circularly scanning an object by a light beam
Inventor:
Toshikazu Kajikawa
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Apr 21, 1987
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.