@patent(,
  author   = "",
  title    = "",
  language = "",
  assignee = "",
  address  = "",
  nationality = "",
  type        = "",
  number      = "",
  day         = "",
  dayfiled    = "",
  month       = "",
  monthfiled  = "",
  year        = "",
  yearfiled   = "",
  note        = "",
  url         = ""
}