diff --git a/modules/bibformat/lib/elements/bfe_patent.py b/modules/bibformat/lib/elements/bfe_patent.py
index 41b54e487..9821a5d2f 100644
--- a/modules/bibformat/lib/elements/bfe_patent.py
+++ b/modules/bibformat/lib/elements/bfe_patent.py
@@ -1,83 +1,98 @@
 # -*- coding: utf-8 -*-
 """BibFormat element - Prints Patent Number"""
 
 def format(bfo, short="no", add_link_to_epo=False):
     """
     Print Patent information.
 
     """
     # it may a good idea to put an information like "published or granted" like :
     # if b1:
     #  return "Granted/Published patent"
     # if a1:
     #  return "Pending patent"
     if short != "no":
         patent_to_print = ""
         patents = bfo.fields('013', escape=2)
         if patents:
             # return only the latest
             for patent in patents:
                 if patent.has_key('a'):
                     patent_to_print = patent['a']
                     return patent_to_print
         return
 
     url_to_espacenet = "http://worldwide.espacenet.com/searchResults?compact=false&PN=%s&ST=advanced&locale=en_EP&DB=EPODOC"
     patents = bfo.fields('013', escape=2)
 
+    tto_file_number = ""
+
+    for external_id in bfo.fields('035__a'):
+        if external_id and external_id.find('(TTO)') != -1:
+            tto_file_number = "%s" % external_id.replace(' (TTO)', '')
+
     if bfo.lang != 'en':
         patent_text = 'Numéro de brevet'
         patents_text = 'Numéros de brevet'
+        dossier_number_text = 'Numéro de dossier'
     else:
         patent_text = 'Patent number'
         patents_text = 'Patent numbers'
+        dossier_number_text = 'File number'
 
     template_output_patent_nr = '<li style="list-style-image:none;"><span class="field-label">%s: <ul style="font-weight:normal;margin-left:10px;">%s</ul></span></li>'
     
     output = []
     # get number with data linked
     patents_nr = []
     patent_priority_dates = []
     outer_list = '<ul class="record-metadata">%s</u>'
 
     # parse
     if patents:
         for patent in patents:
             if patent.has_key('a'):
                 patent_output = patent['a']
                 
                 # add type of number
                 if patent.has_key('c'):
                     patent_output += ' (' + patent['c'] + ')'
 
                 if add_link_to_epo:
                     url_fullfiled = url_to_espacenet % patent['a']
                     patent_output = '<a href="%s" target="_blank">%s</a>' % (url_fullfiled, patent_output)
 
                 patents_nr.append(patent_output)
                 
                 # priority_dates are not shown, but are the same year as the publication date
                 # if patent.has_key('d'):
                 #    patent_priority_dates.append(patent['d'])
     
     # format
     if patents_nr:
         output_patent_nr = []
         for patent_nr in patents_nr:
             output_patent_nr.append("<li>%s</li>" % patent_nr)
 
         if len(output_patent_nr) > 1:
             patent_title = patents_text
         else:
             patent_title = patent_text
 
         output.append(template_output_patent_nr % (patent_title, "".join(output_patent_nr)))
-        
-    return outer_list % "".join(output)
+
+    output_to_return = outer_list % "".join(output)
+
+    if tto_file_number:
+        output_to_return += outer_list % '<li><span class="field-label">' \
+                            + dossier_number_text + ':</span>&nbsp;' +\
+                            tto_file_number + '</li>'
+
+    return output_to_return
     
 def escape_values(bfo):
     """
     Called by BibFormat in order to check if output of this element
     should be escaped.
     """
     return 0
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