ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,727,298, issued on Sept. 1, was assigned to AMS-OSRAM INTERNATIONAL GMBH (Regensburg, Germany).
"Optoelectronic semiconductor layer sequence and optoelectronic semiconductor device" was invented by Daniel Richter (Bad Abbach, Germany) and Gunnar Petersen (Regensburg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an optoelectronic semiconductor layer sequence comprising:-an active layer for generating radiation, and-at least one filter layer configured to at least partially absorb the electromagnetic radiation generated by the active layer of wavelengths smaller than a predetermined cutoff wavelength. The invention also ...