Roberta C. Harper

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St. Joseph's Township, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Molded respirator containing sorbent particles
- Patent number 6,234,171
- Issue date May 22, 2001
- 3M Innovative Properties Company
- James E. Springett
- A41 - WEARING APPAREL
Information Patent Grant
Nonwoven cohesive wrap
- Patent number 6,133,173
- Issue date Oct 17, 2000
- 3M Innovative Properties Company
- John E. Riedel
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Molded respirator containing sorbent particles
- Patent number 6,102,039
- Issue date Aug 15, 2000
- 3M Innovative Properties Company
- James E. Springett
- A41 - WEARING APPAREL