A patent may be obtained by any person who has invented or discovered any new and useful art, machine, manufacture, or composition of matter, or any new or useful improvement thereof, not known nor used by others in this country, and not patented nor described in any printed publication in this or any foreign country, before his invention or discovery thereof, and not in public use or on sale for more than two years prior to his application, unless the same is proved to have been abandoned.

Application must be made to the Commissioner of Patents, signed by the inventor, by his executors or administrators, A complete application comprises the first fee of $15, a petition, specification, and oath; aud drawings, model, or specimen when required. The petition, specification, and oath must be in the English language, and furnished to the Patent Office at Washington, D. C.