Field Combination Search gives 0 results

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Field Combination Search gives 0 results

Christian
Dear all,
I'd like to extract the number of patents that fulfill (all of) the following criteria:

1. registered between 1995 and 1999
2. registered from inventors with residence in Germany or France
3. registered at American, European or Japanese office
4. relate to the IPC classes F02B, F02D, F02F, F02M, F02N or F02P

My syntax to do this is: IC:(("F02B" OR "F02D" OR "F02F" OR "F02M" OR "F02N" OR "F02P")) AND DP:([01.01.1995 TO 31.12.1999]) AND CTR:(("DE" OR "FR")) AND OF:(("US" OR "EP" OR "JP"))

However, the result is 0 patents. Can anyone help me on what I'm missing out? How would I have to adjust the syntax to obtain the desired patents?

Many thanks in advance and best regards
Christian
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Re: Field Combination Search gives 0 results

patentscope-wipo
Administrator
Hello

The corrected query below takes into account your pts 1 & 4

IC:("F02B" OR "F02D" OR "F02F" OR "F02M" OR "F02N" OR "F02P") AND DP:[01.01.1995 TO 31.12.1999]

For pt. 3,  select the offices of interest in the Analysis table above the results.

Unfortunately at the moment, the field for the residence (country) of the applicant and not the inventor-AADC- can only be applied to PCT applications. We are considering making this field also available for the national collections in the future.

Best regards