What is a trademark?

A trademark can be registered for any of the following:

A trademark can be	Examples
An ordinary word	Shell, Crown, Sunshine
An invented word	Google, Toyota, Starbucks, Caltex, Coke, Microsoft, Kit Kat
A phrase	'Lonely Planet', 'Intel Inside'
Letters	GE, BP, BMW, HP
Numerals	4711 (a perfume)
A person's name	Tommy Hilfiger, Levi Strauss
Shape	Qantas' flying kangaroo, a bottle of Coca-Cola, Shell's shell
Colour	BP's distinctive green
Sound	Intel's distinctive musical notes, MGM's lion's roar
Scent	Eucalyptus Radiata scent for golf tees
Movement	Mars's M&M character; Toyota's leaping person