diff --git a/productMods/WEB-INF/rich-export/patent/assignee.sparql b/productMods/WEB-INF/rich-export/patent/assignee.sparql
index 520a3b0b..13befc4c 100644
--- a/productMods/WEB-INF/rich-export/patent/assignee.sparql
+++ b/productMods/WEB-INF/rich-export/patent/assignee.sparql
@@ -1,5 +1,6 @@
 PREFIX core: <http://vivoweb.org/ontology/core#>
 PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX bibo: <http://purl.org/ontology/bibo/>
 
 CONSTRUCT {
      ?assignee ?property ?object .   
diff --git a/productMods/WEB-INF/rich-export/patent/inventors.sparql b/productMods/WEB-INF/rich-export/patent/inventors.sparql
index 598d3b56..3563b082 100644
--- a/productMods/WEB-INF/rich-export/patent/inventors.sparql
+++ b/productMods/WEB-INF/rich-export/patent/inventors.sparql
@@ -1,5 +1,6 @@
 PREFIX core: <http://vivoweb.org/ontology/core#>
 PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX bibo: <http://purl.org/ontology/bibo/>
 
 CONSTRUCT {
      ?person ?property ?object .   
diff --git a/productMods/WEB-INF/rich-export/patent/patent.sparql b/productMods/WEB-INF/rich-export/patent/patent.sparql
index 45b54af0..5be3c9af 100644
--- a/productMods/WEB-INF/rich-export/patent/patent.sparql
+++ b/productMods/WEB-INF/rich-export/patent/patent.sparql
@@ -1,5 +1,6 @@
 PREFIX core: <http://vivoweb.org/ontology/core#>
 PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX bibo: <http://purl.org/ontology/bibo/>
 
 CONSTRUCT {
      ?publication ?property ?object .
diff --git a/productMods/WEB-INF/rich-export/patent/patentFiledDate.sparql b/productMods/WEB-INF/rich-export/patent/patentFiledDate.sparql
index 878c5642..c6923acf 100644
--- a/productMods/WEB-INF/rich-export/patent/patentFiledDate.sparql
+++ b/productMods/WEB-INF/rich-export/patent/patentFiledDate.sparql
@@ -1,5 +1,6 @@
 PREFIX core: <http://vivoweb.org/ontology/core#>
 PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX bibo: <http://purl.org/ontology/bibo/>
 
 CONSTRUCT {
      ?date ?property ?object .
diff --git a/productMods/WEB-INF/rich-export/patent/patentIssuedDate.sparql b/productMods/WEB-INF/rich-export/patent/patentIssuedDate.sparql
index 885227e0..d8d32c00 100644
--- a/productMods/WEB-INF/rich-export/patent/patentIssuedDate.sparql
+++ b/productMods/WEB-INF/rich-export/patent/patentIssuedDate.sparql
@@ -1,5 +1,6 @@
 PREFIX core: <http://vivoweb.org/ontology/core#>
 PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX bibo: <http://purl.org/ontology/bibo/>
 
 CONSTRUCT {
      ?date ?property ?object .