Granted Patent
Utility
US 6,744,506 · App. 10/163,915
Depolarizing plate and an optical apparatus using the same
Inventors:
Tsutomu Kaneko, Toshikazu Yamamoto
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Jun 6, 2002
Inventors
Tsutomu Kaneko
Toshikazu Yamamoto
Assignee (at issue)
Ando Electric 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.