Is it the work "TODO" which has been trademarked, or just the graphic associated with it? If it's the word, I'm disgusted - words and phrases in common usage shouldn't be eligile for trademark.
Trademarks and patents are totally different protections.
A trademark simply prevents competitors from using your name in their product. For example, I can't call my tissues "Kleenex" because that name has been trademarked. I can still make tissues, however. If Kleenex had an active patent on tissues, I wouldn't be able to make and market tissues without infringing on their patent.
That's a substantial difference. At worst (for competitors), this trademark will prevent apps being named something like "ToDo List" or "Mobile ToDo". It won't actually prevent todo apps from being sold.
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[ 2.6 ms ] story [ 36.5 ms ] threadA trademark simply prevents competitors from using your name in their product. For example, I can't call my tissues "Kleenex" because that name has been trademarked. I can still make tissues, however. If Kleenex had an active patent on tissues, I wouldn't be able to make and market tissues without infringing on their patent.
That's a substantial difference. At worst (for competitors), this trademark will prevent apps being named something like "ToDo List" or "Mobile ToDo". It won't actually prevent todo apps from being sold.