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Molded abrasive brush
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Patent number 6,261,156
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Issue date Jul 17, 2001
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3M Innovative Properties Company
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David E. Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Molded abrasive brush
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Patent number 6,126,533
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Issue date Oct 3, 2000
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3M Innovative Properties Company
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David E. Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Molded brush
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Patent number 5,915,436
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Issue date Jun 29, 1999
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Minnesota Mining and Manufacting Company
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David E. Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Molded abrasive brush
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Patent number 5,679,067
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Issue date Oct 21, 1997
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Minnesota Mining and Manufacturing Company
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David E. Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3576049
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Patent number 3,576,049
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Issue date Apr 27, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL