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Find a Japanese Patent?
TOPIC: In this example, you will obtain a Japanese patent using the Kokai Japanese patent number 05-185241. Note that the “5” in the Kokai number stands for the Imperial Year, plus the six-digit publication number. Databases with Japanese patents include Derwent World Patents Index (File 351, 352), JAPIO, (File 347) and INPADOC (File 345).
Different numbers are assigned to stages of the patent process in Japan.
- The Western Year is assigned to the Application number, Unexamined published/“laid open” application number (Kokai), Examined published application number (Kokoku), Granted patent number (Toroku), Utility model application and Utility model patent.
- The Japanese numbering system for the most part uses an annual series so each year begins with document number 1.
- The year of the Emperor (Imperial Year) also makes a difference in the number used. The Imperial Year is used for Unexamined Published Applications (Kokai); the Western Year is used for applications.
COMMAND SUMMARY
BEGIN 351
EXPAND pn=jp 5185241
SELECT E3
TYPE S1/3/1
HOW TO...
1. After entering BEGIN 351 to open Derwent World Patents Index for searching, EXPAND on the patent number (PN=), using the country code (JP) and Imperial Year.
Tip: To find an application number, convert the Imperial Year to the Western Year.
–Hirohito’s reign lasted 63 years (1926-1989) so to convert Emperor year + 25 = Western year (e.g., 61 + 25 = 1986).
–Akihito’s reign began in 1989 so to convert Emperor year + 88 =
Western year (e.g., 2 + 88 = 1990).
2. SELECT the E number (E3). |
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3. TYPE out the record in Format 3 to see the record including the patent family.
Note the application number is listed with the two-digit Western year at the beginning.
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Note: You can also search for the patent using the application number prefix (AN=), country code and number with the Western Year either as two-digits (92) or four-digits (1992). |
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