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Bibliographic data: US3501816 (A) ― 1970-03-24
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US3501816
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| Inventor(s): | HEIMBERGER HELMUT + (HELMUT HEIMBERGER) | ||||
| Applicant(s): | OPTI HOLDING AG + (OPTI HOLDING AG) | ||||
| Classification: |
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| Application number: | USD3501816 19670817 | ||||
| Priority number(s): | DE1966O011910 19660826 | ||||
| Also published as: | NL6709971 (A) DE1610376 (A1) SE311221 (B) GB1130418 (A) | ||||