diff --git a/app/models/patent.rb b/app/models/patent.rb
index c4a4f0e..dc807ef 100644
--- a/app/models/patent.rb
+++ b/app/models/patent.rb
@@ -132,8 +132,8 @@ class Patent
       files = []
       self.patent_files.each do |patent_file|  
         url = patent_file.file.url
-        title = (patent_file.title.blank? ? File.basename(patent_file.file.path) : patent_file.title)
-        files << "<li><a href='#{url}'' target='_blank'>#{title}</li>"
+        title = ((patent_file.title.blank? ? File.basename(patent_file.file.path) : patent_file.title) rescue "")
+        files << (url.nil? ? "" : "<li><a href='#{url}'' target='_blank'>#{title}</li>")
       end
       value = files.join("")
     else