Patent Assignment Abstract of Title
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Total Assignments:
4
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Patent #:
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Issue Dt:
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04/16/1991
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Application #:
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07484406
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Filing Dt:
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02/23/1990
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Inventors:
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ROBERT B. COOLIDGE, DAVID M. NGUYEN
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Title:
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DRILL BIT HAVING IMPROVED CUTTING ELEMENT RETENTION SYSTEM
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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5425 POLK AVE. |
A CORP. OF DE. |
HOUSTON, TEXAS 77023 |
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CHARLES D. GUNTER, JR. |
FELSMAN, BRADLEY, GUNTER & DILLON |
777 MAIN STREET |
2600 CONTINENTAL PLAZA |
FORT WORTH, TX 76102 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST.
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5425 POLK AVE. |
A CORP. OF DE. |
HOUSTON, TEXAS 77023 |
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CHARLES D. GUNTER, JR. |
FELSMAN, BRADLEY, GUNTER & DILLON |
777 MAIN STREET |
2600 CONTINENTAL PLAZA |
FORT WORTH, TX 76102 |
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Assignment:
3
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ASSIGNMENT OF ASSIGNORS INTEREST.
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1600 PACIFIC, A DE CORP. |
DALLAS, TEXAS 75201 |
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ROBERT A. FELSMAN |
PATS. AND TECHNOLOGY MGMNT. |
HUGHES TOOL COMPANY |
P. O. BOX 2539 |
HOUSTON, TX 77001 |
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Assignment:
4
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ASSIGNMENT OF ASSIGNORS INTEREST.
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1600 PACIFIC |
DALLAS, TEXAS 75201 |
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JOHNSON & GIBBS |
100 FOUNDERS SQUARE |
900 JACKSON STREET |
DALLAS, TX 75202-4499 |
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