Burkhard Ziemer

Follow

Person

Berlin, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Process of making a non-sag tungsten wire for electric lamps
- Patent number 5,785,731
- Issue date Jul 28, 1998
- Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
- Martin Fait
- B22 - CASTING POWDER METALLURGY