Patent Assignment Details
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Reel/Frame: | 005223/0775 | |
| Pages: | 2 |
| | Recorded: | 01/26/1990 | | |
Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Total properties:
1
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Patent #:
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Issue Dt:
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01/01/1991
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Application #:
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07471085
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Filing Dt:
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01/26/1990
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Title:
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SEALED ROTARY BLAST HOLE DRILL BIT UTILIZING AIR PRESSURE FOR SEAL PROTECTION
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Assignee
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1600 PACIFIC AVENUE |
DALLAS, TEXAS 75201 |
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Correspondence name and address
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JAMES W. WILLIAMS
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RICHARDS, MEDLOCK & ANDREWS
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4500 RENAISSANCE TOWER
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1201 ELM STR.,
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DALLAS, TX 75270-2197
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