STANDARDGRAPH ZEICHENGERATE GMBH

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Patents Grantslast 30 patents

Information Patent Grant
Pen nib with powder-gasphase diffusion layer
- Patent number 4,540,303
- Issue date Sep 10, 1985
- Standardgraph Zeichengerate GmbH
- Giuseppe Gigli
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES