The courts below have held valid and infringed certain claims of three patents granted to Genzo Shimadzu, a citizen and resident of Japan. The earliest is for a method of forming a finely divided and, consequently, more chemically reactive, lead powder. The second is for a method or process of manufacturing a fine powder composed of lead suboxide and metallic lead and for the product of the process. The third is for an apparatus for the continuous production of lead oxides in the form of a dry fine powder. Such powder is useful in the manufacture of plates for storage batteries.
The bill was filed by the respondents as patentee and exclusive licensee. The answer denied that Shimadzu was the first inventor; asserted knowledge and use of the invention by the petitioner in the United States more than two years prior to the dates of the applications; and pleaded that earlier patents procured by Shimadzu in Japan avoided the United States patents as the former were for the same inventions and each was granted more than a year prior to the filing of the corresponding application in this country. The case was tried, the District Court found the facts, stated its conclusions, and entered a decree for the respondents, which the Circuit Court of Appeals affirmed. The petitioner sought certiorari alleging that the case presents three questions, one which should be settled by this court and two which were decided below contrary to our adjudications.
The questions are: In an infringement suit by the owner of a patent for an invention, made but not patented or published abroad, to restrain an innocent use, the inception of which antedates the application for patent, may the plaintiff prove that his actual date of invention was earlier than the commencement of the asserted infringing use? Is the delay of the patentee in this case in applying for patent a bar to relief for alleged infringement? Does commercial use of the patented process and apparatus in the alleged infringer's plant for more than two years prior to the application for patent preclude redress? No controversy of fact is involved as the petitioner concedes it must accept the concurrent findings of the courts below. The relevant facts lie within a narrow compass.
The inventions which are the basis of the patents were conceived by Shimadzu and reduced to practise in Japan not later than August 1919. He did not disclose the inventions to anyone in the United States before he applied for United States patents. Application was presented for No. 1,584,149 on January 30, 1922; for No. 1,584,150 on July 14, 1923; and for No. 1,896,020 on April 27, 1926. The inventions were not patented or described in a printed publication in this or any foreign country prior to the filing of the applications. The petitioner, without knowledge of Shimadzu's inventions, began the use of a machine, which involved both the method and the apparatus of the patents, at Philadelphia, Pennsylvania, early in 1921 and attained commercial production in June 1921. Over the objection of the petitioner the respondents were permitted by testimony, and by the introduction of contemporaneous drawings and note books, to carry the date of invention back to August 1919, and the courts below fixed that as the date of invention and reduction to practise in Japan.
First. The petitioner asserts that R.S. §§ 4886, 4887, and 4923, considered together, require one who has made an invention abroad to take as his date of invention the date of his application in the United States unless, prior thereto, the invention has been communicated and described to someone in this country, or has been patented abroad. The respondents insist that the sections have no such force. They say that where the alleged infringer is not acting under the supposed protection of a prior patent, but is using an unpatented process or device, the holder of a patent for a foreign invention, like the holder of one for an invention made here, may show novelty by proving that his invention antedated his application and the infringing use.
The solution of the issue requires examination of two of the sections in the light of their development from earlier patent statutes.
R.S. § 4886, as it stood when the patents were granted, was: