Granted Patent
Utility
US 5,538,579 · App. 08/132,968
Method of processing a plurality of glass plates or the like into a circular shape or a method of perforating a plurality of the same material
Inventors:
Kazuhiko Ishimura, Yoichi Ozawa, Ikuo Nagasawa, Masabumi Ito
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Oct 7, 1993
Inventors
Kazuhiko Ishimura
Yoichi Ozawa
Ikuo Nagasawa
Masabumi Ito
Assignee (at issue)
ASAHI GLASS CO., 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.