Roger Perkins

ZINC OXIDE VARISTOR

Process for the production of a lightning arrester and products produced thereby

Process for the preparation of a voltage-dependent ceramic resistance based on ZnO, and a resistance produced by the process

Permanent magnet and method of making it

RE-Co-Fe-transition metal permanent magnet and method of making it

Method for the production of an overvoltage diversion utilizing a ZnO-based varistor, and overvoltage diversion thus produced

Method of manufacturing a ceramic ZnO-based voltage-dependent resistor

PROCESS FOR MANUFACTURING VOLTAGE-SENSITIVE CERAMIC RESISTORS ON THE BASIS OF ZNO AND MANUFACTURED RESISTORS ACCORDING TO THE PROCESS

Process and device for remotely measuring and controlling the operational condition of a high-voltage apparatus.

PROCESS FOR THE MANUFACTURE OF A VOLTAGE DEPENDENT CERAMIC RESISTANCE BASED ON ZNO,AND A VOLTAGE DEPENDENT RESISTANCE THEREOF