Mara E. Liepa

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St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Abrasive brush with filaments having plastic abrasive particles the...
- Patent number 6,352,471
- Issue date Mar 5, 2002
- 3M Innovative Properties Company
- Donna W. Bange
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Abrasive article and method of making such article
- Patent number 6,277,160
- Issue date Aug 21, 2001
- 3M Innovative Properties Company
- Roy Stubbs
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasive article and method of making such article
- Patent number 6,080,215
- Issue date Jun 27, 2000
- 3M Innovative Properties Company
- Roy Stubbs
- B24 - GRINDING POLISHING
Information Patent Grant
Molded brush segment
- Patent number 5,903,951
- Issue date May 18, 1999
- Minnesota Mining and Manufacturing Company
- Richard Ionta
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL