The correct alternatives are: Patents, Copyrights, Trademarks and Trade Secrets.
Patents gives the rights of an invention to its inventor. It forbids other from making, selling or using the inventions without the authorization of the holder of the patent.
Copyrights protects authors of literary works, music, dramatic works, computer software, architectural works, etc.
Trademark protects words, phrases, symbols or designs that distinguish products. An example of trademarked design is the Nike "Swoosh"
Trade Secrets refer to formulas, processes, devices or pretty much any information companies want to keep a secret to give them an edge over their competitors. Computer algorithms could be an example of Trade Secret.
