Syntax

[kethya]

can someone advise of a syntax to query:

patents issued prior to March 31, 2005

Thank you

[patentscope-wipo]

Here they are

DP:[* TO 31.03.2005]
DP:[1800 TO 31.03.2005]
DP:[31.03.2005-100years TO 31.03.2005]

patentscope-wipo