Broken lines form no part of the claimed design, and any shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.
Broken lines form no part of the claimed design, and any shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.
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3M product literature for 3M™ 3000 Half Mask Series Respirator dated 2009. |
3M product literature for 3M™ 3000 Series Single-Cartridge Half-Facepiece Respirator dated 2009. |
3M product literature for 3M Respiratory Protection 7700 Series Single-Filter Half-Facepiece Respirator dated 2008. |
Koken web literature for Particulate Respirators, http://www.koken-ltd.co.jp/english/particulaterespirators.htm, obtained from internet on Sep. 22, 2011. |
North web literature for 7190N99 Welding Half Mask, http://www.northsafety.com/TriggerWorkflow.aspx?WorkflowModuleGUID=a3c3bf34-f500-45aa-a73f-13a246669a21&Alias=NSUS&SB—ContentItemGuid=b55fb755-d4a7-40dc-8e76-f21a2d582782&KeepSession=True&Tags:PC Tags:PC—ItemGuid=0b20f978-ad7c-413f-8b8c-e1ee2b710a19, obtained from internet on Sep. 22, 2011. |
Shigematsu web literature for DR77R Respirator, http://www.stsjapan.com/products/bojin/detail.php?id=DR77R. obtained from internet on Sep. 26, 2011. |