Patent Assignment Details
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Reel/Frame: | 004867/0375 | |
| Pages: | 2 |
| | Recorded: | 04/26/1988 | | |
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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07/04/1989
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Application #:
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07186509
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Filing Dt:
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04/26/1988
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Title:
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PROCEDURE FOR MEASURING THE RATE OF PENETRATION OF A DRILL BIT
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Assignee
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5000 GULF FREEWAY |
HOUSTON, TEXAS 77023 |
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Correspondence name and address
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SCHLUMBERGER LIMITED
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ATTN: PATENT COUNSEL
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200 MACCO BLVD.
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SUGAR LAND, TX 77478
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