Am I breaking laws if I am creating custom invitations with cartoon or movie characters such as Dora for sale?

If you do not want to be doing any wrong you need to NOT do this. These images are not your property and not public property, they are the property...

On the copyright website, it states work published before 1923 is considered public domain, but are there exceptions?

Well, none of us are likely to violate our ethical constraints and do free legal research about Oscar Wilde copyrights for you. We know, however,...

You need to have a review by a copyright or internet attorney. Scraping facts is likely okay, but when you start scraping "product names", which I...

In the context you describe the "Redbook" is likely the Marquis Who's Who in American Law...

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You don't give us details and so we can only advise that what you can do is see an IP lawyer for a review and advice. With specifics, whatever we...

No, disassembling does not give you the right. And, unlike copyrights or trademarks, one infringes a patent even when non-commercial use is...

NO, generally not, depending on the respective goods or services involved. You need to have that evaluated by an IP attorney. The DuPont...

You have three options: buy the item without the expired coupon, decline to purchase and take your business elsewhere, or hire a lawyer and try to...

Is it copyright or fair use to use the ideas of a show for videos?

Nice try, but no cookie! This is most likely derivative work not parody and infringement not fair use. Your amateur self-rationalization is fairly...

In a novel, yes, you likely can do that. Just be careful not to borrow much else from the movie.