1
Daniel A Japuntich, Nicole V McCullough, Jane K Peterson, Nicholas R Baumann, John W Bryant, Christopher P Henderson, Bruce E Penning: Face mask that has a filtered exhalation valve. 3M Innovative Properties Company, Karl G Hanson, July 1, 2003: US06584976 (62 worldwide citation)

A filtering face mask that covers at least the nose and mouth of a wearer and that includes an exhalation valve. The exhalation valve opens in response to increased pressure when the wearer exhales to allow the exhaled air to be rapidly purged from the mask interior. An exhale filter element is plac ...


2
Graham J Bostock, John W Bryant, Desmond T Curran, Christopher P Henderson, Dennis L Krueger, James F Dyrud: Flat-folded personal respiratory protection devices and processes for preparing same. 3M Innovative Properties Company, James A Rogers, September 26, 2000: US06123077 (50 worldwide citation)

Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member ...


3
Graham J Bostock, John W Bryant, Desmond T Curran, Christopher P Henderson, Dennis L Krueger, James F Dyrud: Flat-folded personal respiratory protection devices and processes for preparing same. 3M Innovative Properties Company, Karl G Hanson, November 26, 2002: US06484722 (39 worldwide citation)

Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member ...


4
John W Bryant, Desmond T Curran, James F Dyrud, Christopher P Henderson, Harold J Seppala, Elfed I Williams: Multi-part headband and respirator mask assembly and process for making same. Minnesota Mining and Manufacturing Company, James A Rogers, March 10, 1998: US05724677 (37 worldwide citation)

A multi-part headband attachable to a face mask blank and a method of attaching the same. The multi-part headband has a unit length corresponding to the distance between the attachment locations as measured along a surface of the face mask blank or along an axis intersecting the attachment locations ...


5
John W Bryant, Desmond T Curran, James F Dyrud, Christopher P Henderson, Harold J Seppala, Elfed I Williams: Multi-part headband and respirator mask assembly and process for making same. 3M Innovative Properties Company, James A Rogers, November 21, 2000: US06148817 (31 worldwide citation)

A multi-part headband attachable to a face mask blank and a method of attaching the same. The multi-part headband has a unit length corresponding to the distance between the attachment locations as measured along a surface of the face mask blank or along an axis intersecting the attachment locations ...


6

7
Graham J Bostock, John W Bryant, Desmond T Curran, Christopher P Henderson, Dennis L Krueger, James F Dyrud: Flat-folded personal respiratory protection devices and processes for preparing same. 3M Innovative Properties Company, Karl G Hanson, David R Cleveland, May 27, 2003: US06568392 (24 worldwide citation)

Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member ...


8
Graham J Bostock, John W Bryant, Desmond T Curran, Christopher P Henderson, Dennis L Krueger, James F Dyrud: Flat-folded personal respiratory protection devices and processes for preparing same. 3M Innovative Properties Company, Karl G Hanson, May 3, 2005: US06886563 (22 worldwide citation)

Fold-flat personal respiratory protection devices that have a flat substantially rectangular central portion having first and second edges, at flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first ...


9
Andrew S Viner, Audra A Conlan, Brian Cormack, Malcolm R Watson, Christopher P Henderson, Desmond T Curran, Elfed I Williams: Filter element that has a thermo-formed housing around filter material. 3M Innovative Properties Company, Karl G Hanson, April 5, 2005: US06874499 (18 worldwide citation)

A filter cartridge (5), suitable for attachment to a respiratory mask, has a housing that includes an air inlet (27), an air outlet (39), and filter material (17, 19) through which air to be filtered travels through when passing from the inlet to the outlet. At least part of the housing includes a s ...


10
Graham J Bostock, John W Bryant, Desmond T Curran, Christopher P Henderson, Dennis L Krueger, James F Dyrud: Flat-folded personal respiratory protection devices and processes for preparing same. 3M Innovative Properties Company, Karl G Hanson, David R Cleveland, March 25, 2003: US06536434 (17 worldwide citation)

Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member ...