Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
patent [ˈpeɪtnt] n (COMM) пате́нт
vt (COMM) патентова́ть*(запатентова́ть*perf)
adj (obvious) я́вный*я́вен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.