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Patents

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US39664352 May 197429 Jun 1976Electrostatic dust filter
US403516429 Nov 197412 Jul 1977Minnesota Mining and Manufacturing CompanyMethods for removing charged and non-charged particles from a fluid by employing a pyrollectric filter
US497837210 Mar 198918 Dec 1990Pleated charged media air filter
US54844726 Feb 199516 Jan 1996Miniature air purifier
US566756414 Aug 199616 Sep 1997Wein Products, Inc.Portable personal corona discharge device for destruction of airborne microbes and chemical toxins
US581413515 Sep 199729 Sep 1998Portable personal corona discharge device for destruction of airborne microbes and chemical toxins
US604263728 Sep 199828 Mar 2000Corona discharge device for destruction of airborne microbes and chemical toxins
US670192511 Apr 20029 Mar 2004Protective hood respirator
USD2944109 Apr 198523 Feb 1988Siebe North, Inc.Valve assembly for a respirator

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