Patent Assignment Abstract of Title
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Total Assignments:
3
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Patent #:
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Issue Dt:
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11/09/1993
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Application #:
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07872809
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Filing Dt:
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04/24/1992
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Inventors:
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ROBERT-JAN BARTELS, HANS-DIETER PIOTROWSKI
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Title:
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PERCUSSION MECHANISM FOR A DRILL ROD UNIT
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| HELENENSTRASSE 149 |
| W-4300 ESSEN 1, GERMANY |
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| SPENCER, FRANK AND SCHNEIDER |
| 1111 - 19TH STREET, NW |
| WASHINGTON, DC 20036 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| HELENENSTRASSE 149 |
| D-45143 ESSEN, GERMANY |
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| VENABLE, BAETJER, HOWARD & CIVELETTI |
| GABOR J. KELEMEN |
| P.O. BOX 34385 |
| WASHINGTON, DC 20043-9998 |
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Assignment:
3
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| HELENENSTRASSE 149 |
| D-45143 ESSEN, GERMANY |
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| VENABLE, BAETJER, HOWARD ET AL. |
| GABOR J. KELEMEN |
| P.O. BOX 34385 |
| WASHINGTON, DC 20043-9998 |
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