Is “packet sniffer” trademarked?
The word “sniffer” is a registered trademark by Network Associates referring to the “Sniffer(r) Network Analyzer”. However, the term “snif” is used in many other products (some of which are listed in this document) and the term “sniffer” is more popular in everyday usage than alternatives like “protocol analyzer” or “network analyzer” (as far as my search on AltaVista reveals). I’m not sure what this means in trademark law, where brandnames like “aspirin”, “escalator”, and “cellophane” lose their distinctiveness over time.
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