The invention can't just replicate something already invented. It must be new and unique to what already exists. Obtaining a patent can be very expensive and time consuming. It can take many years, and up to thousands of dollars after the lawyer is paid. Generally a lawyer that specializes in patents must file the papers and help in drafting the application.
Copyrights are more common than patents, and definitely more accessible.
Just about every company has information that needs to be copyrighted. A copyright gives the owner of the work the right to make copies of the work and revise the work. When you write, or create work that is able to be copyrighted it is automatically protected. To acquire even more protection you may file a copyright registration form with the Copyright Office. If you have someone other than an employee create work for your business, for example a logo, you probably want to have the creator sign a work for hire document including the transfer of copyright.