Intellectual Property

How Do I Interview people for a Book and Proptect Myself from Liability or Infringement?
I am writing a non fiction book. The source of my information in interviewing people. What kind of phrase or form would I use to gain the interviewee's permission and gain rights over the information to protect my intellectual property?
Can a Common Phrase Be Trademarked?
i want to make some t shirts to sell can i tradmark a phrase like hunt'em to put on a Tee shirt?
Can I Be Sued for Trade Name Infringement?
relative to Intellectual property: We started a weight loss center the first of last year. Our business name is Advance HCG Diet Center. So we now have received a letter from 'The Diet Center' telling us that we cant use 'Diet Center' in our name. Is that correct?
How Do I Protect a Product Design Other Than By Obtaining a Patent?
I have designed an accessory part for a existing product on the market. This is a low sales volume of 400 units over a few years. The design is unique only for this application and can copied. Other than a patent, how can I protect this design? The item will sell for $90/120.00.
I am in business as a DBA, 1 partner is going to buy me out.
I am in business as a DBA, 1 partner is going to buy me out, but it is taking much longer than it should and his buy out terms are not acceptable to me.The question is, my partner has already started a LLC with the same name as the DBA, with his new partners on the LLC, they are curently doing business under the LLC.I would think that this would be illegal, some sort of faurd? Am I wrong, I would love to use this to get more on the buy out and speed it up.ThanksEd