It also depends if they have registered the trademark on the principal or supplemental registers. Trademarks which are descriptive in nature (such as this one) often can't get on the primary register (though they may after extensive use that results in the mark acquiring a secondary meaning). If a trademark is registered on the supplemental register it doesn't afford the owner the right to exclusive use of that mark - even for similar products. All being on the supplemental register gets you is the right to prevent other similar trademarks being registered.