Patent Assignment Details
NOTE:Results display only for issued patents and published applications.
For pending or abandoned applications please consult USPTO staff.
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| Reel/Frame: | 004944/0954 | |
| Pages: | 2 |
| | Recorded: | 08/26/1988 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Total properties:
14
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Patent #:
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Application #:
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04831694
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Title:
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Application #:
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04876417
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Title:
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Patent #:
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02/01/1972
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Application #:
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05008866
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Filing Dt:
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02/05/1970
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Title:
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APPARATUS FOR RECOVERING A DRILL STEM
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Patent #:
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Application #:
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05028755
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Title:
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Application #:
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05063189
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Title:
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Patent #:
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06/17/1975
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Application #:
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05467972
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Filing Dt:
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05/08/1974
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Title:
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Patent #:
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Issue Dt:
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01/24/1978
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Application #:
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05761185
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Filing Dt:
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01/21/1977
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Title:
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DOUBLE-WALLED PIPE CONSTRUCTION
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Patent #:
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Issue Dt:
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06/23/1981
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Application #:
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05890068
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Filing Dt:
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03/27/1978
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Title:
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MULTIPLE WALL DRILL PIPE
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Patent #:
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Issue Dt:
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02/01/1983
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Application #:
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05942550
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Filing Dt:
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09/15/1978
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Title:
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MULTI-PURPOSE MOBILE DRILL RIG
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Patent #:
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Issue Dt:
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07/06/1982
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Application #:
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06166143
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Filing Dt:
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07/07/1980
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Title:
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METHOD OF ASSEMBLING MULTIPLE WALL DRILL PIPE
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Patent #:
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Issue Dt:
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05/31/1983
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Application #:
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06237934
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Filing Dt:
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02/25/1981
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Title:
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INNER PIPE SUPPORT ARRANGEMENT FOR DOUBLE-WALLED DRILL PIPE
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Patent #:
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Issue Dt:
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04/15/1986
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Application #:
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06416641
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Filing Dt:
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09/10/1982
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Title:
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EARTH DRILLING APPARATUS
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Patent #:
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Issue Dt:
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01/21/1986
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Application #:
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06416699
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Filing Dt:
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09/10/1982
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Title:
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DUAL-WALL DRILL PIPE
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Patent #:
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Issue Dt:
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10/21/1986
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Application #:
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06761365
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Filing Dt:
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08/01/1985
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Title:
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DUAL-WALL DRILL PIPE
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Assignee
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| 111 - 58TH AVENUE, S.W. |
| CALGARY, ALBERTA, CANADA T2H 0X3 |
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Correspondence name and address
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HAYES, SOLOWAY, HENNESSEY, ET AL
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175 CANAL STREET
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MANCHESTER, N.H. 03101
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