| PQ Corporation | Practical Inventions, LLC ( Torrance, CA ) | PRACTICE FUSION, INC. ( San Francisco, CA ) |
| PQ Corporation ( Berwyn, PA ) | Practical Law Company Limited | Practice With The Pros, Inc. ( Matthews, NC ) |
| PQ Corporation ( Valley Forge, PA ) | Practical Peripherals, Inc. ( Thousand Oaks, CA ) | Practicefirst.com L.L.C. ( Foxboro, MA ) |
| PQ Corporation, Inc. ( Berwyn, PA ) | Practical Products Ltd. ( North Vancouver, CA ) | Practicon, Inc. ( Greenville, NC ) |
| PQ Holding, Inc. ( Wilmington, DE ) | Practical Products Mfg. Ltd. | Practima Ltd.( Nesher ) |
| PQ Zeolite B. V. ( Leiden, NL ) | Practical Products Mfg. Ltd.( Hong Kong ) | Practima Ltd. ( Tel Hanan, IL ) |
| PQI CONSULTING ( Cambridge, MA ) | Practical Products Mfy. Ltd.( Hong Kong ) | Prade; Ernstfried( Kinsau ) |
| PR Electronics A/S( Ronde ) | Practical Products Mfy. Ltd.( Kowloon ) | Pradella Giovanni( Pieve Di Soligo ) |
| PR Partners ( Pasadena, TX ) | Practical Products, Co. ( West Chicago, IL ) | Pradella; Giovanni( Pieve Di Soligo ) |
| PR Phamaceuticals ( Fort Collins, CO ) | Practical Products, Inc. ( Salt Lake City, UT ) | Prado Technologies( Bromptonville ) |
| PR Pharmaceuticals, Inc. ( Fort Collins, CO ) | Practical Products, LLC ( Pasadena, CA ) | Pradom Limited ( London, GB2 ) |
| PR Software Oy | Practical Systems, Inc. ( Tarpon Springs, FL ) | Praecis Phamaceuticals, Inc. ( Waltham, MA ) |
| Prac Solutions, Inc. ( Los Angeles, CA ) | Practical Tank Management, Inc. | Praecis Pharmaceuticals Inc. |
| Prac-Tech-Cal ( Laguna Beach, CA ) | Practical Tank Management, Inc. ( Fort Worth, TX ) | Praecis Pharmaceuticals Inc. ( Waltham, MA ) |
| Practical Devices, Inc. ( Glendale, CA ) | PRACTICAL TECHNOLOGIES, INC. | Praecis Pharmaceuticals Incorporated ( Waltham, MA ) |
| Practical Engineering, Inc. ( Roseville, MI ) | Practical Technology, Inc. | Praecis Pharmaceuticals, Inc. ( Cambridge, MA ) |
| Practical Innovations LLC ( Allendale, MI ) | Practical Transportation, Inc. ( Santa Clara, CA ) | |
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