1 files changed, 34 insertions, 1 deletions
diff --git a/macros/latex/contrib/biblatex-contrib/biblatex-iso690/iso-authortitle.bbx b/macros/latex/contrib/biblatex-contrib/biblatex-iso690/iso-authortitle.bbx
index ab683014ce..298c5a04e7 100644
--- a/macros/latex/contrib/biblatex-contrib/biblatex-iso690/iso-authortitle.bbx
+++ b/macros/latex/contrib/biblatex-contrib/biblatex-iso690/iso-authortitle.bbx
@@ -1,9 +1,42 @@
 \ProvidesFile{iso-authortitle.bbx}
-  [2020/03/25 v0.4.0 ISO 690 biblatex bibliography style]
+  [2022/03/20 v0.4.1 ISO 690 biblatex bibliography style]
 
 \RequireBibliographyStyle{iso}
 \ExecuteBibliographyOptions{%
   sorting=nty,
 }
 
+% Sorting based on the default definition, but adding
+% holder and origyear to work with patent entry types.
+\DeclareSortingTemplate{nty}{
+  \sort{
+    \field{presort}
+  }
+  \sort[final]{
+    \field{sortkey}
+  }
+  \sort{
+    \field{sortname}
+    \field{holder}
+    \field{author}
+    \field{editor}
+    \field{translator}
+    \field{sorttitle}
+    \field{title}
+  }
+  \sort{
+    \field{sorttitle}
+    \field{title}
+  }
+  \sort{
+    \field{sortyear}
+    \field{origyear}
+    \field{year}
+  }
+  \sort{
+    \field{volume}
+    \literal{0}
+  }
+}
+
 \endinput