List of generic trademarksThe following list comprises those marks which were originally created and used as trademarks, but which have subsequently become entirely synonymous with the common name of the relevant product or service. Marks which appear in this list have become so generic that their former status as proprietary trademarks is often unknown to the general public. Such marks may therefore be considered "fully generic", whereas genericized marks which are at risk of becoming generic are listed in the next section.crock pot – Crock-Pot is sold by Rival Industries, but "crock pot" and "crockpot" are common synonyms used by cooks to describe slow cookers.pilates exercise system – trademark formally canceled by court in 2000touch-tone – dual tone multi-frequency telephone signaling. AT&T states "formerly a trademark of AT&T"Webster's dictionary – the publishers with the strongest link to the original are Merriam-Webster, but they have a trademark only on "Merriam-Webster", and other dictionaries are legally published as "Webster's Dictionary" Non-trademarksSome common names for products or services are popularly believed to be genericized trademarks. However this in not the case as the names were never originally created or used as trademarks. Some examples are listed below.In some cases companies have managed to register common names as trade marks, however this typically results in the eventual cancellation or surrender of the registration concerned. This has occurred in the United States in relation to rooibos. List of genericized trademarksTrademarks in this list are still trademarked but in common use as a generic and thus in jeopardy of losing trademark status. Whereas the list at the top contains former trademarks that no longer have legal status.The following list comprises those marks which have been registered as trademarks, and which may continue in use and be actively enforced by their trademark owners, but which are also commonly used generically. However, none of these marks should be regarded as legally abandoned or in the public domain, and therefore each should always be capitalized. Writing guides such as the Associated Press Stylebook advise writers to "use a generic equivalent unless the trademark is essential to the story."