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<patent> Patent Number (in a citation)

In a bibliographic citation (<element-citation> or <mixed-citation>) or a citation to a related object (<related-object>), this element holds identification information for a patent.
Attributes
content-type
country
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<element-citation>, <mixed-citation>, <nlm-citation>, <related-article>, <related-object>
Description
Text, numbers, or special characters, zero or more
Content Model
<!ELEMENT  patent       (#PCDATA %patent-elements;)*                 >
Expanded Content Model

(#PCDATA)*

Tagged Sample

In a citation of type “patent” 

...
<mixed-citation publication-type="patent"
  publication-format="print"
 ><person-group person-group-type="inventor"
  ><string-name><surname>Goss</surname>, 
   <given-names>K.</given-names></string-name></person-group>, 
 <source>Cryptographic Method and Apparatus 
  for Public Key Exchange with Authentications</source>, 
 <patent country="US">U.S, Patent no. 4,956,863</patent>, 
 <month>Sept.</month> <day>11</day>, 
 <year>1990</year>.</mixed-citation>
...