Can I use art work that was given to me by a fellow associate 20 years ago on t-shirts for sale?

Copyright includes at least the exclusive rights to reproduce the copyrighted work in copies, to prepare derivative works based on the copyrighted...

Can I purchase a patent from a company

Generally, patents can be purchased or assigned. You should discuss with an intellectual property attorney in a private consultation.

Altering a saying and using commercially ?

Generally, you should do a US full trademark search which would include at least, USPTO registered trademarks, USPTO pending trademark...

If you change packaging material of someone else's product and sell, there are at least trademark infringement concerns. You may be able to...

Can I get sued for using partial theme song lyrics in a song?

If you copy the lyrics to someone else's song you may be liable for copyright infringement. You should discuss with an intellectual property...

Would animating branded items into comical characters be considered a parody ?

Copyright includes at least the exclusive rights to reproduce the copyrighted work in copies, and to prepare derivative works based on the...

Can I be sued for taking a idea and putting my own twist on it?

Not clear what you mean by "presentation". There may be, at least, trade dress, trade secret, copyright and trademark concerns. You...

If you put someone else's trademark on a product and introduce into a stream of commerce you may be liable for at least trademark infringement....

What happens when a patent expires in the process of lawsuit? The case will be dismissed or continued?

Generally, you may be liable for patent infringement for the time period that the patent was in force. You should discuss with an intellectual...

So I started working on part of my novel and I’m 10 pages in can I copyright my book so far or. No ?

You may want to file for pre registration. See: https://www.copyright.gov/prereg/ You should discuss with an intellectual property attorney...