diff --git a/app/models/patent.rb b/app/models/patent.rb
index 84624f1..f37df0e 100644
--- a/app/models/patent.rb
+++ b/app/models/patent.rb
@@ -57,7 +57,7 @@ class Patent
 
     fields_to_show.each do |t|
       if (self.fields[t].type.to_s == "String" rescue false)
-        fields_to_remove << t if (datas.where(t.to_sym.ne => nil, t.to_sym.ne => "").count == 0 rescue false)
+        fields_to_remove << t if (datas.where(t.to_sym.ne => nil).or(t.to_sym.ne => "").count == 0 rescue false)
       else
         fields_to_remove << t if (datas.where(t.to_sym.ne => nil).count == 0 rescue false)
       end