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Truncation

To extend your search, you can use truncation symbols (wildcards) to include, for example, the plural form of a word, or alternative spellings.

There are three different wildcard characters available:


• * stands for a string of characters of any length

• ? stands for zero or one character

• # stands for exactly one character


There are a number of restrictions on the use of wildcards:

Wildcards cannot be followed by an alphanumeric character.

There must be at least two alphanumeric characters preceding a ? or # symbol (for example co? or pa#). A maximum of three truncation symbols is then allowed (for example, ca??? will retrieve call, cart, card, care, cable, etc.).

If three or more alphanumeric characters precede a ? or # symbol, then a maximum of 7 truncation symbols is allowed.

There must be at least three alphanumeric characters preceding a * symbol.

You should not use wildcards in the IPC field, as the data is "auto truncated". It is sufficient to enter for example, either B65 (class level), B65D (subclass level), B65D81 (group level) or even B65D81/32 (subgroup level). The same rule is valid for dates.

You cannot truncate the application numbers.

Please note :

In SmartSearch, if you enter wo2006, you will retrieve Publication number WO0002006. However, if you enter wo2006*, the system will not find any documents as wo2006* is recognised as a text and not as a number. In order to retrieve all results starting with WO2006, you should place the field identifier pn (Publication number) in front of the number, e.g. pn=wo2006* in the SmartSearch. The same is valid for Priority numbers, e.g. pr=wo2006*