Patent Assignment Abstract of Title
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Total Assignments:
2
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Patent #:
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Issue Dt:
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08/30/1983
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Application #:
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06303892
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Filing Dt:
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09/21/1981
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Inventor:
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MARTIN D. CHERRINGTON
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Title:
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APPARATUS AND PROCESS FOR DRILLING UNDERGROUND ARCUATE PATHS AND INSTALLING PRODUCTION CASINGS, CONDUITS, OR FLOW PIPES THEREIN
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Assignment:
1
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CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). MAY 21, 1987
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| ALLEGRETTI & WITCOFF, LTD. |
| 10 SOUTH WACKER DR. |
| CHICAGO, IL 60606 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| 3430 ROGERDALE RD. |
| A CORP. OF TX |
| HOUSTON, TEXAS 77042 |
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| A. BLAIR HUGHES |
| ALLEGRETTI & WITCOFF, LTD. |
| 10 SOUTH WACKER DR. |
| CHICAGO, IL 60606 |
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