Patents - CANADA -3 PHASE VACUUM SWITCH ENERGY ABSORPTION - CANADA-3 PHASE VACUUM SWITCH WITH ANTI BOUNCE CONTACTSHomePatentsCANADA -3 PHASE VACUUM SWITCH ENERGY ABSORPTIONCANADA-3 PHASE VACUUM SWITCH WITH ANTI BOUNCE CONTACTS CANADA-3 PHASE VACUUM SWITCH WITH ANTI BOUNCE CONTACTSUSA Patent shown, Canadian same.