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| | Long & Chybik - Patent & Intellectual Property Attorneys |
 | | A service mark is a word, name, symbol or device or any combination thereof which is used to identify and distinguish the services of one person from goods manufactured or sold by others and to indicate the source of the services, even if the source is unknown. |
 | | A certification mark is any word, name, symbol, or device, or any combination used by a person or an entity, other than its owner of the mark, to certify origin, material, mode of manufacture, quality, accuracy, region or other characteristics of the goods or services. |
 | | Conversely, collective trade/service marks indicate the source of goods or services in that the source of these goods or services is the member of a particular group. |
| www.patents-tm.com /trademarks/trademarksbackground.htm (1159 words) |
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