Granted Patent
Utility
US 5,644,374 · App. 08/410,902
Variable focus type eyesight correcting apparatus
Inventors:
Hiroyuki Mukaiyama, Kazutoshi Kato, Akira Komatsu
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Mar 27, 1995
Inventors
Hiroyuki Mukaiyama
Kazutoshi Kato
Akira Komatsu
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.