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Harold J. Seppala

3M

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Publication

Featured researches published by Harold J. Seppala.

Archive | 1993

Unidirectional fluid valve.

Daniel A. Japuntich; Vaughn B. Grannis; Harold J. Seppala; Anthony B. Ferguson

Archive | 1997

Multi-part headband and respirator mask assembly and process for making same

John W. Bryant; Desmond T. Curran; James F. Dyrud; Christopher P. Henderson; Harold J. Seppala; Elfed I. Williams

Archive | 1991

Respirator harness assembly

Harold J. Seppala; Alex A. Wawiluk

Archive | 2001

Filtering face mask that has a new exhalation valve

Daniel A. Japuntich; Vaughn B. Grannis; Harold J. Seppala; Anthony B. Ferguson

Archive | 1989

Adherent protective collars

Alex A. Wawiluk; Harold J. Seppala; Arthur Fry

Archive | 2000

Fibrous filtration face mask having a new unidirectional fluid valve

Daniel A. Japuntich; Vaughn B. Grannis; Harold J. Seppala; Anthony B. Ferguson

Archive | 1996

Elastomeric composite headband

John W. Bryant; Desmond T. Curran; James F. Dyrud; Christopher P. Henderson; Dennis L. Krueger; Harold J. Seppala; Elfed I. Williams

Archive | 2001

Method of making a filtering face mask that has an exhalation valve

Daniel A. Japuntich; Vaughn B. Grannis; Harold J. Seppala; Anthony B. Ferguson

Archive | 1992

Article for liquid containment and recovery

Michael R. Berringan; Harold J. Seppala

Archive | 2007

Method Of Making A Filtering Face Mask Having New Exhalation Valve

Daniel A. Japuntich; Vaughn B. Grannis; Harold J. Seppala; Anthony B. Ferguson

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Collaboration

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Anthony B. Ferguson

3M

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Daniel A. Japuntich

3M

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Vaughn B. Grannis

3M

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James S. Mrozinski

3M

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Christopher P. Henderson

3M

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Desmond T. Curran

3M

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James F. Dyrud

3M

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John W. Bryant

3M

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Alex A. Wawiluk

3M

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Elfed I. Williams

3M

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