These logos are few of the iconic ones in the history of branding. Oh, and how the Apple logo can be forgotten. The silvery half bitten apple has become a rage.
Coming back to the logo designing, some logos also use the wordmark- the name of the company as a logo. Or, they include a wordmark with a visual element. Whatever the case may be, creating a logo for the brand is no easy task. It acts as an identity of a brand and so you do not want to mess that up.
Although there is no secret recipe of designing a logo, there sure is a guideline which you can follow that keeps your design in check.