Granted Patent
Utility
US 5,792,822 · App. 08/601,034
Transparent plastic material, optical article based on the material, and production method thereof
Inventors:
Toshiyuki Miyabayashi, Jun Kinoshita
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Feb 23, 1996
Inventors
Toshiyuki Miyabayashi
Jun Kinoshita
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.