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Patents
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Frank Mack - US Patent 4418924 Dec 6, 1983
Bi-Surface Sealing Mechanism
| File name | Mack_Bi_surface_sealing_mechanism_with_rollin.pdf |
| File Size | 146.12k |
| Linked to | The United States Patent and Trademark Office; James Frank Mack |
| Albums | Frank Mack Patents |
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