@patent{almendro,
  author       = {Almendro, Jos{\'e} L. and Mart{\'i}n, Jacinto and S{\'a}nchez,
                  Alberto and Nozal, Fernando},
  title        = {Elektromagnetisches Signalhorn},
  number       = {EU-29702195U},
  date         = 1998,
  location     = {countryfr and countryuk and countryde},
  langid       = {german},
  annotation   = {This is a \texttt{patent} entry with a \texttt{location}
                  field. The number is given in the \texttt{number} field. Note
                  the format of the \texttt{location} field in the database
                  file. Compare \texttt{laufenberg}, \texttt{sorace}, and
                  \texttt{kowalik}},
}

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