A cube corner type retroreflector comprised of transparent solid material or the like wherein retroreflective units of preferably different types are distributable over the entire surface of a product reflector. Individual retroreflective units are arranged in row in such retroreflector and all of the...http://www.google.es/patents/US4066331?utm_source=gb-gplus-sharePatente US4066331 - Cube corner type retroreflectors with improved cube corner unit relationships
Cube corner type retroreflectors with improved cube corner unit relationships
