Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Back projection screen in a video projector

Back projection screen in a video projector

US Patent 4921330 · Granted May 1, 1990

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Projection display having improved light shielding bodies for adjusting the amou2014
Projection display apparatus2012
Projection display having improved light shielding bodies for adjusting the amou2011
Projection display apparatus2011
Projection display apparatus2010
Lens device and projector having diaphragm mechanisms with substantially trapezo2007
Projector having an illuminance detector2006
Lens device and projector having diaphragm mechanisms with apertures having inwa2006
Lens device and projector having diaphragm mechanisms with substantially triangu2006
Lens device and projector having diaphragm mechanisms with substantially square 2006
Projector having an image signal controller2006
Projection lens device and projector2006