DDBJ constraucts the International DNA Databases, with EMBL in Europe and GenBank in the USA.

DDBJ, EMBL, and GenBank take the publishable patent DNA data into the INSD,
mediating JPO, EPO and USPTO, respectively. And also from this February 2008,DDBJ started to take into and release patent related DNA data by KoreanIntellectual Property Office (KIPO)

Following DNA and protein data from KIPO was released by DDBJ;

  entry number accession number
DNA 168,562 DI000001-DI168562
PROTEIN 113,555 DI500001-DI613555
TOTAL 282,117  

These entries are searchable by getentry.

Note: DDBJ has been functioning as one of the International Nucleotide Sequence
Database Collaboration, including EBI (European Bioinformatics Institute; responsible
for the EMBL database) in Europe and NCBI (National Center for Biotechnology).
Information; responsible for GenBank database) in the USA as the two other members.