Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Switching circuit supply for telephone subscriber equipment - has Graetz bridge network using transistors which provides switched supply dependent upon subscriber loop polarity
Abgreif- und Anschlussschelle, sogenannte Zwickschelle, fuer Widerstaende, insbesondere emaillierte Widerstaende, und Verfahren zur Herstellung von Widerstaenden under Verwendung solcher Schellen