1. ALPHA-BREAK

Serial Number: 76346418
Owner: (REGISTRANT) Clearwater, Inc. CORPORATION PENNSYLVANIA 5605 Grand Avenue Pittsburgh PENNSYLVANIA 15225
Filed on: 12/10/2001

2. ALPHA-CLEAN

Serial Number: 76346504
Owner: (REGISTRANT) Clearwater, Inc. CORPORATION PENNSYLVANIA 515 Post Oak Blvd. Suite 600 Houston TEXAS 77027

(LAST LISTED OWNER) WEATHERFORD/LAMB, INC. CORPORATION 515 POST OAK BLVD. SUITE 600 HOUSTON TEXAS 77027

Filed on: 12/10/2001

3. DESICCANT Z

Serial Number: 76366109
Owner: (REGISTRANT) Clearwater, Inc. CORPORATION PENNSYLVANIA 5605 Grand Avenue Pittsburgh PENNSYLVANIA 15225
Filed on: 02/04/2002

4. GET A GRIP

Serial Number: 76463869
Owner: (REGISTRANT) Weatherford/Lamb, Inc. CORPORATION DELAWARE 515 Post Oak Blvd. Suite 600 Houston TEXAS 77027
Filed on: 11/04/2002

5. STRATAPAC

Serial Number: 78328229
Owner: (REGISTRANT) Weatherford/Lamb, Inc. CORPORATION DELAWARE 515 Post Oak Blvd., Suite 600 Houston TEXAS 77027
Filed on: 11/14/2003

6. WS

Serial Number: 78212971
Owner: (REGISTRANT) Weatherford/Lamb, Inc. CORPORATION DELAWARE 515 Post Oak Blvd. Suite 600 Houston TEXAS 77027
Filed on: 02/10/2003

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