Hänvisningar finns i följande patent|
| US4291079 | 12 dec 1979 | 22 sep 1981 | Rohr Industries, Inc. | Method of manufacturing a honeycomb noise attenuation structure and the structure resulting therefrom | | US7153561 | 11 jul 2003 | 26 dec 2006 | Kimberly-Clark Wordwide, Inc. | Absorbent article with graphic design thereon |
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