Field combinatiom search

[Claudia]

Hello

I'm looking for patents in wind energy, the query I used is IC:"F03D" OR "H02K 7/18" OR "B63B 35/00" OR "E04H 12/00" OR "F03D 11/04" OR "B60K 16/00" OR "B60L 8/00" OR "B63H 13/00"

However, when I look for patents by year, I got so much more patents!!

PD:2005 AND IC:"F03D" OR "H02K 7/18" OR "B63B 35/00" OR "E04H 12/00" OR "F03D 11/04" OR "B60K 16/00" OR "B60L 8/00" OR "B63H 13/00"

[Christophe]

Dear Claudia,

You need to add parentheses in your query for a proper logic:

PD:2005 AND (IC:"F03D" OR "H02K 7/18" OR "B63B 35/00" OR "E04H 12/00" OR "F03D 11/04" OR "B60K 16/00" OR "B60L 8/00" OR "B63H 13/00")

The query return 1,904 records.

I hope it helps,

Best regards,

Christophe