| Plymouth Products Inc (Plymouth, IN)
|
| Precise Marketing (Raleigh, NC)
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| Precision Abrasives (Pittsburgh, PA)
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| Preferred Abrasives Inc (Troy, OH)
|
| Pressure Blast Mfg Co (Manchester, CT)
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| Prima International (Chicago, IL)
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| Production Abrasive (Punxsutawney, PA)
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| R & D Laminations Inc (Plainfield, IL)
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| R & K Industrial Products (Richmond, CA)
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| R K Grinding (Huntington Park, CA)
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| Radiac Abrasives Inc (Salem, IL)
|
| Rdm Multi-Enterprises (Anaconda, MT)
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| Red Hill Grinding Wheel Corp (Pennsburg, PA)
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| Reed Minerals (Tampa, FL)
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| Regis Manufacturing Co (Dallas, TX)
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| Relco Abrasives (Taunton, MA)
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| Research Abrasive Products Inc (Wickliffe, OH)
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| Resource Coated Abrasives Inc (Houston, TX)
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| River Front Abrasive Co (Cincinnati, OH)
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| Roswell Manufacturer (Houston, TX)
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| Saint-Gobain Abrasives (Travelers Rest, SC)
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| Saint-Gobain Abrasives (Brownsville, TX)
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| Saint-Gobain Norton Ind (Worcester, MA)
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| Saint-Gobain Universal Abrsvs (Romulus, MI)
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| Sample Marshall Labs Inc (Lyndhurst, NJ)
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