Can i leave my company and recreate a product that I worked on while employed there?

The best you can get is a "maybe." If you take no steps whatsoever while drawing a paycheck, use no company resources, take no trade secrets and...

What kind of agreement can protect my exclusive use of a product I have a patent pending but manufactured by another party?

If they are willing, there is no reason you cannot have an agreement that they will exclusively produce the product for you. You want to be sure...

Can I use popular songs in a digital recording for music boxes I am making for profit?

If the songs are copyrighted you cannot make duplicates without a license. I theory you could, literally, make a music box that has a CD/DVD...

It sounds like they may have a copyright infringement claim. If they are truly alleging it is illegal to be a non-authorized reseller, that part...

Can you tell the details about your product after you file for a provisional patent?

The a very thorough answer above explains the procedures. There is no such thing as a 'provisional patent'. Your provisional patent application...

Can you make guess the movie t-shirts without violating trademark law?

As pointed out above each one will need to be evaluated. Names of a single movie are less likely to be protected as trademarks, but the more...

Does USPTO send a hard copy of registration certificate if the trademark application was filed online?

Yes. It will take a while. Check the address you used if it's been a long time.

Can I start a company with around product that I build for my employer

Do you really want an answer to such questions on a public board? Retain an intellectual property lawyer and get a confidential opinion.

My business has been contacted by a serial scam artist, how best to protect myself?

There's not enough information here. Legitimate claims by ASCAP and photo licensing organizations tend to be "dismissed" without attention to...

Would I be breaking copyright laws by painting photos of motorcycles with their logos on the Painting?

Probably not a copyright issue, depending on the logo. Using the logos would be a trademark issue. If you make it clear the company is not...