Not without the permission of the owner of the trademark. See IP Counsel.

Reverse Engineering of a hair product.

Recipes are not protected by patent. But Methods of Making something are patented. Merely changing two or three ingredients is not enough to...

There surely is a job marketing firm(s) that actually know the demand for patent agents. Your own contact with companies, as previously advised,...

Your store sells several types of goods. You'll be selling in interstate commerce. you customers will know who the source is of the goods your...

If the person has protection from publicity or privacy then a problem. If the depiction suggests representation or support for the goods/services...

Can I Trademark the same name as another business?

If the classes of goods or services differs from the goods/services of another having a similar in sight or sound Trademark then the proposed mark...

Can I sell copies of a painting that depict a celebrities face?

Rights of publicity are noted in the first paragraph. Also issues regarding copyright. See IP Counsel.

How can I ask a cancellation of a trademark?

The earlier registration in the US has priority of the filing date. Your client will have to show prior common law use in the US to have rights...

Can I use the same wording ( text ) on my product which is the same as my competitors

The text of your competitor is probably a copyright property. Your use is likely copyright infringement. See IP Counsel.

Do I have legal rights to receive royalties on a book I fully illustrated?

The illustrations are copyright properties - but whose? What was your contract with the test author? What is your contract with the publisher? ...