A
trademark,
trade mark, or
trade-mark is a recognizable
sign,
design, or
expression which identifies
products or
services of a particular source from those of others, although trademarks used to identify services are usually called
service marks. The trademark owner can be an individual,
business organization, or any
legal entity. A trademark may be located on a
package, a
label, a
voucher, or on the product itself. For the sake of
corporate identity trademarks are being displayed on company buildings.