Horst Hoffmann

Follow

Person

Glonn, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Diaphragm keyboard
- Patent number 4,771,143
- Issue date Sep 13, 1988
- Wilhelm Ruf KG
- Horst Hoffmann
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Switching contact arrangement, in particular for keyboards and a ke...
- Patent number 4,575,589
- Issue date Mar 11, 1986
- Firma Wilhelm Ruf KG
- Horst Hoffmann
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multi-layer conductor plate and a method of making
- Patent number 4,520,228
- Issue date May 28, 1985
- Wilhelm Ruf KG
- Horst Hoffmann
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Printed board for electrical circuits
- Patent number 4,440,823
- Issue date Apr 3, 1984
- Wilhelm Ruf KG
- Horst Hoffmann
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR