Formed 1947 at Ljubljana as Letalski Konstrokcijski Biro at Higher Technical School. Several prototypes and sailplanes plus KB-6 Matajur tourer/trainer. Merged 1960 with Institut 'Branko Ivanus' to form Letalski Institut 'Branko Ivanus' Slovenija, continuing production of KB-11 Branko, LK-1 and sailplanes and adding Czech L-200D made under licence.