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| Patents for E. I. dup Pont de Nemours & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,419,880 | Apr. 29, 1947 | E.C. Pitman, C.W. Hawley, J.W. Clough, L.L. Blyler | Polyvinyl resin adhesive composition, plywood, and method of making plywood | ||