Spectralens Trademarks

SPECTRALENS
Optical coatings
Abandoned  ·  July 29, 2005  ·  78681415  · 
spectralens
SPECTRALENS
optically improved Fresnel lens for concentrating sunlight onto solar cells
Abandoned  ·  June 9, 1993  ·  74399580  · 
SPECTRALENS
LIGHT DIFFUSERS IN THE NATURE OF LENSES FOR USE IN FLUORESCENT LIGHTING FIXTURES
Cancelled  ·  August 31, 1987  ·  73681485  ·