Donald Duck & Co #32/1967

In "Den slemme oppfinneren," the cunning Emil Eagle schemes his way into Gyro Gearloose’s lab under the guise of a vacuum cleaner salesman, only to be thwarted by the inventor’s quick thinking. When Emil returns disguised as a firefighter, tricking Gyro into jumping into a net trap, he nearly escapes with stolen plans—until Gyro’s clever thinking cap and robot bloodhound set a clever trap of their own.