Harvey J. Berg

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St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Methods of forming fibrous filtration face masks
- Patent number 5,307,796
- Issue date May 3, 1994
- Minnesota Mining and Manufacturing Company
- Joseph P. Kronzer
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Grant
Resilient shape-retaining fibrous filtration face mask
- Patent number 4,807,619
- Issue date Feb 28, 1989
- Minnesota Mining and Manufacturing Company
- James F. Dyrud
- A41 - WEARING APPAREL
Information Patent Grant
Molded fibrous filtration products
- Patent number 4,536,440
- Issue date Aug 20, 1985
- Minnesota Mining and Manufacturing Company
- Harvey J. Berg
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS