Zippo “click” a registered trademark

Granted first in the United States, with other markets set to follow, the trademark has been awarded in recognition of Zippo’s careful manufacturing process which produces the highly distinctive sound, synonymous with the windproof lighter. It joins an exclusive line-up of other trademarked sounds including The Hunger Games’ Mockingjay Whistle and famed MGM Lion roar, among others.

More here.