High temperature PTC device and conductive polymer composition Application US-6090313-A United States of America 18 Jul 2000
Conductive polymer materials for high voltage PTC devices Application US-6074576-A United States of America 13 Jun 2000
High temperature PTC device and conductive polymer composition Application US-5985182-A United States of America 16 Nov 1999
High temperature PTC device comprising a conductive polymer composition Application US-5837164-A United States of America 17 Nov 1998