Foreign patent publications that use Arabic and Roman numerals in lieu of names to indicate the date show in order the day, month, and year, or alternatively, the year, month, and day. Roman numerals always refer to the month.
Japanese patent application publications show the date in Arabic numerals by indicating in order the year of the reign of the Emperor, the month, and the day. To convert the Japanese year of the Emperor to the Western calendar year, for years prior to 1989, add 1925 to the JAPANESE YEAR. For example: 40.3.6 = March 6, 1965. For years after 1988, add 1988 to the JAPANESE YEAR.