Gerald Grotsch

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Furth, DE

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Patents Grantslast 30 patents

Information Patent Grant
Device for screwing a writing instrument tip into a writing fluid r...
- Patent number 4,981,383
- Issue date Jan 1, 1991
- J. S. Staedtler GmbH & Co.
- Gerald Grotsch
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Tip removal device
- Patent number 4,892,428
- Issue date Jan 9, 1990
- J. S. Staedtler GmbH & Co.
- Gerald Grotsch
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES