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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). |

?b 351
[File 351] Derwent WPI 1963-2006/UD,UM &UP=200629
(c) 2006 Thomson Derwent. All rights reserved.
?e pn=jp 5185241
Ref Items Index-term
E1 1 PN=JP 5185239
E2 1 PN=JP 5185240
E3 1 PN=JP 5185241
E4 1 PN=JP 5185242
E5 1 PN=JP 5185243
E6 1 PN=JP 5185244
E7 1 PN=JP 5185245
E8 1 PN=JP 5185246
E9 1 PN=JP 5185247
E10 1 PN=JP 5185248
E11 1 PN=JP 5185249
E12 1 PN=JP 5185250
E13 1 PN=JP 5185251
E14 1 PN=JP 5185252
E15 1 PN=JP 5185253
E16 1 PN=JP 5185254
E17 1 PN=JP 5185255
E18 1 PN=JP 5185256
E19 1 PN=JP 5185257
E20 1 PN=JP 5185258
E21 1 PN=JP 5185259
E22 1 PN=JP 5185260
E23 1 PN=JP 5185261
E24 1 PN=JP 5185262
E25 1 PN=JP 5185263
Enter PAGE for more
?s e3
S1 1 PN='JP 5185241' |

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. |

1/3/1
Derwent WPI
(c) 2006 Thomson Derwent. All rights reserved.
009575813
WPI Acc No: 1993-269359/199334
XRAM Acc No: C93-119932
XRPX Acc No: N93-206994
Superposition resistance welder - comprising carriage with
drive, electrode rings with drive, sensor to detect carriage
transfer rate, sensor to detect peripheral rate of electrode rings, etc.
NoAbstract
Patent Assignee: KAWASAKI STEEL CORP (KAWI )
Number of Countries: 001 Number of Patents: 002
Patent Family:
Patent No Kind Date Applicat No Kind Date Week
JP 5185241 A 19930727 JP 925784 A 19920116 199334 B
JP 2500002 B2 19960529 JP 925784 A 19920116 199626
Priority Applications (No Type Date): JP 925784 A 19920116
Patent Details:
Patent No Kind Lan Pg Main IPC Filing Notes
JP 5185241 A 9 B23K-011/06
JP 2500002 B2 9 B23K-011/06 Previous Publ patent JP 5185241
|

Note: You can also search for the patent using the application number prefix (AN=), country code and number with the Western Year. |

?e an=jp 925784
E1 1 AN=JP 9257831
E2 1 AN=JP 9257838
E3 1 AN=JP 925784
E4 1 AN=JP 9257840
E5 1 AN=JP 9257842
E6 1 AN=JP 9257844
E7 1 AN=JP 9257845
E8 1 AN=JP 9257846
E9 1 AN=JP 9257847
E10 1 AN=JP 9257848
E11 1 AN=JP 925785
E12 1 AN=JP 9257850
E13 1 AN=JP 9257851
E14 1 AN=JP 9257854
E15 1 AN=JP 9257855
E16 1 AN=JP 9257857
E17 1 AN=JP 9257858
E18 1 AN=JP 9257859
E19 1 AN=JP 925786
E20 1 AN=JP 9257863
E21 1 AN=JP 9257866
E22 1 AN=JP 9257868
E23 2 AN=JP 9257869
E24 1 AN=JP 925787
E25 1 AN=JP 9257870
Enter PAGE for more
?s e3
S1 1 AN='JP 925784' |
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