Advanced filter syntax

List of operators

Operator

Example

Short notation

Example

AND

cleaning AND shaver

& (ampersand)

cleaning & shaver

OR

cleaning OR shaver

| (pipe)

cleaning | shaver

NOT

cleaning NOT shaver

- or ! (hyphen or exclamation mark)

No space between – or ! and word

cleaning –shaver

cleaning !shaver

NEAR/N

cleaning NEAR/5 shaver

none

none

Remarks:

  • There always is implicit AND operator -> cleaning shaver means cleaning AND shaver
  • NEAR is a generalized proximity operator allowing N-1 maximum words between.  See Search with proximity for usage.
  • OR operator precedence is higher than AND

Start simple

Search for the words cleaning and shaver but not automatic in title and abstract

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Remark: Search isn’t case sensitive. A search for shaver is the same as a search for Shaver

Search with an exact word

Word stemming is used in our search engine. Word stemming is a language related tool, which determines the root of a word first, and then retrieves all possible variants.

Search term

Word stemming

Matching results would have the word(s)

compose

On (searches for variants of compose)

compose, composes, composed, composing, composable, composition etc

=composition

Off (searches for exact word)

composition

composition

On (searches for variants of the root word "compose")

composition, Compositions, Compose, composes, composed, composing, composable etc

=metallic

Off (searches for exact word)

Metallic

metallic

On (searches for variants of the root word "metal")

Metallic, Metal, Metals etc.

Search with an exact phrase

Put quotation marks around words "[any word]" to search for an exact phrase in an exact order. Keep in mind that searching with quotes might exclude relevant results. For instance, a search for "Alexander Bell" will miss patents that refer to Alexander G Bell.

advanced-syntax-exact-phrase.png

Search with proximity

advanced-syntax-proximity.png

 This means that there must be less than 4 words between cleaning and shaver.

Text in title abstract

Found?

Cleaning device for dry shaver

Yes (only 3 words between)

Cleaning device for a dry shaver

No (4 words between)

Shaver with cleaning device

Yes (only 1 word between, order doesn’t matter)

Tip: If you want to search for an inventor, you can use this proximity syntax.

 advanced-syntax-proximity-inventor.png

With this filter you will find all patents of Thomas Edison or Edison Thomas

Advanced proximity search can be done with the operator NEAR

advanced-syntax-proximity-near.png

This means there can be maximum 3 words between cleaning or electric and shaver or razor

Text in title abstract

Found?

Cleaning device for dry shaver

Yes (only 3 words between)

Electric device for a dry razor

No (4 words between)

Shaver with cleaning device

Yes (only 1 word between, order doesn’t matter)

Search with quorum

advanced-syntax-quorum.png

Quorum matching operator introduces a kind of fuzzy matching. It will only match those patents that pass a given threshold of given words. The example above ("cleaning electric device dry shaver razor"/3) will match all patents that have at least 3 of the 6 specified words. Operator is limited to 255 keywords.

Grouped queries

 advanced-syntax-grouped-queries.png

With brackets you can make more advanced filter queries.

‘Nested’ queries are also allowed.

Wildcard must be at the end of a word

 advanced-syntax-wildcard-error.png

Special characters must be between quotes

e.g. for chemical elements

 advanced-syntax-quotes-error.png

List of allowed special characters:

 , . - ( ) ' [ ] _ + ; : 

 


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