Do defunct apps in the App Store receive common use law priority?

The answer to your direct question is yes common law rights are garnered by first use and extend to the scope of one's market penetration and...

Are there any copyright-related or other legal issues with generating revenue on annotations/notes related to cited sources?

You received some good responses. I agree that you really need a proper fair use analysis conducted here. I suggest that you consult with a...

I need to find out if someone is committing Trademark Infringement by using my trademark without permission?

If you are taking this as seriously as it sounds, you need some specific and real legal advice not a free and public Q&A platform. Everything needs...

What is the argument for your earlier trademark that similar to an applied for tm over third party tm?

So regards to the mark you already own you should have placed the Examiner on notice of that so they do not flag it as a conflict. But if it is in...

If this is solely for the personal use for worship like some friends getting together for a gospel hour then it would not be actionable...

You are not obligated to remove their marks, but that is one way you can avoid creating any market confusion as to the source of the goods. In many...

Unregistered website name just trademarked by another company (which hasn't used name yet)

If you have been using it, you have garnered rights presumably under common law that extend to the scope of your market penetration and market...

What do I need to do if another competing company nearly copies the domain name of my company and linked it to his company?

There is absolutely no way to address this here without all the details. A domain is just an address at the end of day, but it could also be...

Can this record company stop me from posting on YouTube?

If the record company also created their own authorized recording of this performance, based on their written agreements with the artist then you...

Can I put my design on a site like Redbubble to print products?

Sure, this could be a copyright infringement based on the substantial similarity of the creative expression as between your content and the various...