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Beginner

Select the Beginner's mode if you are a newcomer or have little searching experience. It has an easy-to-use intuitive search interface .
Expert

The Expert mode is recommended for users experienced in patent searches. This mode allows to create more complex search queries.
IKOFAX

The IKOFAX mode is suitable for users proficient in the fields of IKOFAX syntax and the DEPATIS database system.
Family

Via the document number you can ascertain patent family members (also possible in any result list).
PIZ support

Via the "PIZ support" mode you can forward requests to pros at the German Patent Information Centres. You will receive the answer by e-mail/mail/fax.