Air filters for air conditioners in vehicle passenger compartments; Air handlers; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Electric fans; Electric food warmers in the nature of dishes, portable household appliances, bowls, and trays; Electrically-heated carpets; Heaters and warmers for medical and surgical solutions; Industrial apparatus using air for drying and cleaning components in the electronics, semiconductor, circuit ...