While a patent search is not required prior to applying for a patent, it can be invaluable to an inventor in their research efforts. Patents and Published patent applications can be searched using on-line searching tools for inventions not only in the United States, but also in other countries around the world. A patent and a published patent application must convey to others how to make and practice the invention covered by patent. In addition, a patent must disclose the best mode of practicing the invention. Therefore, a patent search can provide a unique perspective for an inventor prior to filing a patent application.