wlett-Packard CompanyIncreasing the resistance of a light emitting diode and other semiconductor devices to extremes of temperatureUS551672720 Ene 199514 May 1996International Business Machines CorporationMethod for encapsulating light emitting diodesUS55197205 Ene 199421 May 1996Mitsubishi Denki Kabushiki KaishaSemiconductor light emitting deviceUS552623710 Dic 199311 Jun 1996General Electric Com