Granted Patent
Utility
US 6,603,590 · App. 09/953,362
Optical modulation device and projector
Inventors:
Yasunori Ogawa, Nobuo Watanabe, Hiromi Saito, Shigeo Toda
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Sep 17, 2001
Inventors
Yasunori Ogawa
Nobuo Watanabe
Hiromi Saito
Shigeo Toda
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.