1
Otto L Huber, Mark Magidson: Multi-layer face mask with molded edge bead. Moldex Metric Products, Charles H Schwartz, Ellsworth R Roston, June 19, 1984: US04454881 (104 worldwide citation)

A face mask to be worn upon the face of a wearer and for providing filtering of particular impurities in the air, including at least one layer of flexible material molded generally to conform to the contours of the face of the wearer and forming a flexible support carrier for filter material and wit ...


2
Mark Magidson, Dan Dix: Earplug. Moldex Metric, Charles H Schwartz, September 28, 1999: US05957136 (100 worldwide citation)

An earplug composed of a resilient polymeric material including a first hollow member having a closed end and an open end and with the closed end having a rounded cone shaped configuration. At least one flange member extending from the first hollow member and having a similiar cone shaped rounded co ...


3
Heinz Wandel, Martin Skov: Breathing mask. Moldex Metric Products, Charles H Schwartz, Ellsworth R Roston, December 4, 1990: US04974586 (75 worldwide citation)

A breathing mask is provided which comprises an exhaling valve disposed in an opening of the breathing mask wall. The exhaling valve includes a thin diaphragm which is adapted to be moved by the breathing pressure during inhaling and exhaling either towards or away from a sealing seat. To provide a ...


4
Mark Magidson, Otto L Huber: Disposable filter respirator with inner molded face flange. Moldex Metric Products, Charles H Schwartz, Ellsworth R Roston, October 17, 1989: US04873972 (72 worldwide citation)

A filter respirator forming a face mask to be worn upon the face of a user including a support layer of flexible material. The support layer is molded to conform to the contours of the face of the user and forms a flexible support layer for filter material. A separate layer of filter material filter ...


5
Otto L Huber, Mark Magidson: Disposable face mask. Moldex Metric Products, Charles H Schwartz, Ellsworth R Roston, May 24, 1983: US04384577 (48 worldwide citation)

A face mask for filtering air to a wearer including a plurality of non-woven fibers molded in a generally cup shaped configuration for fitting over the mouth and nose of the wearer and with the cup shaped configuration including a nose bridge portion for lying along the bridge of the nose of the wea ...


6
Michael Forbes Scholey, Terry L Grimsley: Respirator mask with snap in filter cartridge. Moldex Metric, Charles H Schwartz, October 9, 2001: US06298849 (43 worldwide citation)

A respirator mask, including a body member of a thin rigid plastic material and having an inner surface conforming to the face of a user. The body member includes as an inner surface and at least one opening to receive a filter cartridge. A first over-molded member is formed of a flexible, rubber-li ...


7
Mark Magidson, Michael Forbes Scholey: Unidirectional fluid valve. Moldex Metric, Charles H Schwartz, April 11, 2000: US06047698 (40 worldwide citation)

A unidirectional fluid valve for use with a respirator includes a flexible flap initially formed as a flat resilient member. A valve body has a flat valve seat to support the flexible flap. The flexible flap is contoured to make contact with the valve seat when a fluid is not passing through the val ...


8
Mark Magidson: Headband with dual material construction for supporting ear protectors. Moldex Metric, Charles H Schwartz, November 3, 1998: US05829062 (39 worldwide citation)

A headband ear protector apparatus including a pair of ear protectors and a resilient head band supporting, at opposite ends of the headband, the ear protectors. This forms a band which positions the ear protectors to lie by the opposite ears of a person. The headband is formed of a combination of h ...


9
Mark Magidson: Earplug. Moldex Metric, Charles H Schwartz, September 19, 2006: US07107993 (38 worldwide citation)

An earplug composed of an injected molded resilient polymeric material for insertion into an ear canal by a fingertip of a user, including an elongated member having a nose portion formed as a curved front end. An open cup shaped rearward extending flange located at the end of the elongated member o ...


10
Mark Magidson: Disposable face mask. Moldex Metric Products, Charles H Schwartz, Ellsworth R Roston, March 16, 1982: US04319567 (37 worldwide citation)

A face mask formed by a plurality of fibers and generally having a cup shape to fit over the mouth and nose of a wearer and for filtering the air passing through the fibers, including, a nose bridge portion, nose pad portions to either side of the nose bridge portion to fit against the sides of the ...