Granted Patent
Utility
US 5,011,345 · App. 07/446,588
Contour machining method and apparatus for printed circuit board
Inventors:
Masao Nishigai, Tamio Otani, Yasuhiko Kanaya, Tetsuo Murakami
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Dec 6, 1989
Inventors
Masao Nishigai
Tamio Otani
Yasuhiko Kanaya
Tetsuo Murakami
Assignee (at issue)
Hitachi Seiko Ltd.
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.