{
  "$type": "site.standard.document",
  "description": "An air filter element 10 for an internal combustion engine, the air filter element 10 having a noise reduction feature comprising first and second contiguous air-permeable regions 12, 14 wherein the first region has a thickness and/or density different from that of the first air-permeable region…",
  "path": "/patents/993351",
  "publishedAt": "2013-01-30T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D39/1623",
    "NISSAN MOTOR MFG UK LTD [GB]"
  ],
  "textContent": "An air filter element 10 for an internal combustion engine, the air filter element 10 having a noise reduction feature comprising first and second contiguous air-permeable regions 12, 14 wherein the first region has a thickness and/or density different from that of the first air-permeable region, and the first region is optimised for noise reduction and the second region is optimised for air filtration.",
  "title": "Air filter element with noise reduction"
}