Granted Patent
Utility
US 6,199,983 · App. 09/091,191
Apparatus and method for manufacturing a progressive multi-focal lens
Inventors:
Kazutoshi Kato, Akira Komatsu, Hiroyuki Mukaiyama, Tadashi Kaga
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Jun 10, 1998
Inventors
Kazutoshi Kato
Akira Komatsu
Hiroyuki Mukaiyama
Tadashi Kaga
Assignee (at issue)
SEIKO EPSON 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.