Barriergen, Inc.

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Malvern, PA, US

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Information Patent Grant
Hypoallergenic jewelry and method of making the same
- Patent number 4,861,658
- Issue date Aug 29, 1989
- Barriergen, Inc.
- Donald L. Griffin
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

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