[albybisy]

so it can't be copyrighted.

[Zambyte]

Logos never could be. You're thinking of trademark.

[papercrane]

Some logos can be copyrighted. Most logos however don't meet the threshold of originality. The Copyright Office will reject copyrights for stylized letters (see IBM logo), or logos of simple geometric shapes. With the modern aesthetic for logos to be as simple as possible this means nearly all the logos you see are not copyrighted.

[gorlilla]

It can be probably be trademarked though.