Our company makes uniforms for many sports teams whom provide us with a general design and logo, we then create a sketch of the uniforms and after approval by the client create the uniforms based on the approved design. We have a client whom has ordered three times with one style. This company has since let go a member of their team whom is threatening to sue us for trademark infringement, claiming that he alone had the rights to use the logos and not our client. My basic question is if we make uniforms in this fashion using client provided logos and designs, which we put together and have approved by the client, can we be held liable if the logos are indeed trademarked, or is the client whom requested the uniforms and provided the design liable?