Can the validity of a registered trademark be challenged?

• What is a trademark?

• Must a trademark be registered to become exclusive?

• What are the advantages of registering a trademark?

• How should a trademark or service mark name be selected?

• Can the same trademark be registered in connection with different products?

• What information is needed to register a trademark?

• How is use of a trademark or service mark in commerce established?

• How is an “intent to use” trademark application processed?

• Does a U.S. Trademark registration prevent foreign competitors from using the mark?

• How long does a trademark registration last?

• Can the validity of a registered trademark be challenged?

Microwave Boiler and Hot Water Heater

Pre-Ignition Fuel Treatment System

Simulated Balloon Display and Method

Botanical Drug Compositions

Computer for Emergency Responders

Pet Carrier Garment

Human Echolocation System

Water Based Adhesive Curing Process

Hand Wash Monitoring System

Validity can be challenged in defense of a trademark infringement action. After the mark has been registered for 5 years, however, its validity is conclusively established, and a successful challenge becomes very unlikely.