Chitsimikizo cha boma ------ Yison ali ndi zaka 25 zakubadwa mumakampani omvera, wapambana mayeso amsika, ndipo wazindikiridwa ndi boma, ndipo wapereka ziphaso zambiri zomwe zimatizindikira.
Satifiketi yotumiza kunja------ Pankhani yotumiza kunja, timathandizira kuitanitsa kwamakasitomala, ndipo kuti tipereke mwayi wabwino wotumiza kunja, timafunsira satifiketi yotumiza katundu watsopano chaka chilichonse.
Satifiketi ya patent------ Yison wakhala mumakampani omvera kwa zaka 25, kafukufuku wodziyimira pawokha ndi chitukuko, kapangidwe kake, kutsegulidwa kwa nkhungu paokha, kupanga paokha, ndipo adalandira ziphaso zopitilira 50, komanso adalandiranso mayankho ambiri abwino kuchokera kwa makasitomala.
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