Fumitomo Hide, Ph.D.

How to Read Japanese Patents

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As we discussed in the Introduction to Japanese Patents section, your preferred source of timely technical information is likely to be the unexamined patent application publications (A).  

Fig. 2 shows the 1st page of an unexamined patent application publication (A).  You can tell by looking at field 12 at the top center of the page which shows 6 characters followed by "A".  

Fig. 2: First page of an unexamined patent application publication

You can easily obtain an English translation of the abstract.  Field 11 at the top right of the page is the publication number, Heisei 7-64048.  Heisei 7 is the 7th year in the Heisei era and corresponds to 1995 in the Western calendar.  

Table 2 lists the correspondence between the Showa and Heisei eras to the Western calendar.

Japanese Year

Western Year

Showa Era  
46 1971
50 1975
55 1980
60 1985
64 1989
Heisei Era  
1 1989
5 1993
10 1998
11

1999

Table 2: Japanese - Western Calendar Correspondence

The JPO database contains Kokai publications (A) starting from 1971 (Showa 46).  Kokai publication numbers contain the year in which it was published followed by a serial number.  Starting with the year 2000, the Western years are used in the Kokai publication (A) numbers.

To obtain an English abstract from the JPO database:

  • Go to the English language JPO web site

  • Select the Patent & Utility Model Gazette DB

  • In the kind code field, enter A, and in the number field, enter H07-064048 (the year part should have 2 digits and the serial number part should have 6 digits).

To obtain an English abstract from the EPO database:

  • Go to the EPO web site

  • Select Japan or Worldwide

  • In the publication number field, enter JP7064048.

Next chapter is How to Search Japanese Patents.  

 

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