The law does not require that the information disclosed in the patent specification be sufficient for commercial exploitation of the invention. Thus, patent usually will not disclose sufficient information for commercialization. Know how on the other hand, covers all information necessary to commercialize the invention e.g. setting up a production plant. Such information would include, for example, details of the production methods, the design drawings etc. It is this know how which is traded while transferring technology. Know how is always kept as a trade secret and not shared with public. Know how is not protected through patents as most of it is non-patentable matter and one does not take patent on the remaining parts to avoid public disclosure. A know how developed around an existing patent and commercialized subsequently may be an infringement of the patent unless the patentee has agreed to commercialization on mutually agreed terms.