Donald L. Griffin

Follow

Person

West Chester, PA, US

People

Patents Grantslast 30 patents

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-...