{
  "url": "https://patentimages.storage.googleapis.com/74/fd/86/b5f74bca6594d3/US6536306.pdf",
  "observedAt": "2026-10-04T19:17:23.416Z",
  "note": "Native Download PDF link navigated to this original storage.googleapis.com PDF. Download event did not return a file path before the tool timeout; this is a preserved access limitation."
}