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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05/29/1990
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Application #:
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07292243
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Filing Dt:
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12/30/1988
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Inventor:
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DOUGLAS W. LEE
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Title:
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DOWNHOLE SURGE VALVE FOR EARTH BORING APPARATUS
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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BANNER, BIRCH, MCKIE & BECKETT |
ONE THOMAS CIRCLE, N.W. |
WASHINGTON, DC 20005 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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1700 SOUTH MOUNT PROSPECT ROAD |
DE PLAINES, ILLINOIS 60018 |
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MARK E. FEJER |
GAS TECHNOLOGY INSTITUTE |
1700 SOUTH MOUNT PROSPECT ROAD |
DES PLAINES IL 60018 |
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