The search function

You can search the patent database with or without using search operators. Without search operators, the search engine will only find identical terms.


How the search works

After you have entered your search term or terms into the search box and started the search, the following fields will be searched for results:


  1. Title

  2. Patent number

  3. Application number

  4. Owner

  5. Representative

  6. Inventor

  7. International Patent Classification (IPC)

  8. Cooperative Patent Classification System (CPC)

  9. PCT application number (international application)

  10. PCT publication number (international publication)


Please note that your search will only produce results if the character sequence is found exactly as you have entered it. For example, if you search for photo, it will only find results for the word photo and not photos, photograph or photographer. If you want to find other spellings or similar terms, please use the advanced search options.
If you enter more than one search term, the results will contain at least one of these terms (default operator OR).


Upper/lower case

The search engine does not differentiate between upper and lower case letters.


Terms containing umlauts and other accents

Umlauts (ä, ö, ü) and other accents (e.g. à, ô, ç) are not taken into account by the search engine. This is also true if you use double quotation marks to search for exact word sequences. It therefore does not matter if you type umlauts or accents – a search for schön or schon will produce the same results. You cannot, however, use ae, oe or ue in place of ä, ö or ü.


Terms containing special characters

The search engine does not recognise special characters. This includes the characters +  -   /  & !  (  ). Full stops and commas are recognised.
Because special characters function like spaces, the character sequences before and after a special character (e.g. PC-Doctor) are treated like separate terms (search for PC and Doctor). Therefore, please place search terms with special characters in double quotation marks –