4. Combustion
  5. Burner having electrical heater or igniter
  6. Igniter in shelter chamber

David P. Welden

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Concrete forming and curing apparatus

Static molds – Including means within surface to confine heat exchange medium
Patent

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Direct fired hot water generator with more than one heat exchang

Stoves and furnaces – Liquid heater – Fluid fuel burner for other than top-accessible vessel
Patent

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Direct fired hot water generator with more than one heat exchang

Combustion – Burner having electrical heater or igniter – Igniter in shelter chamber
Patent

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Dual heat source heating system

Heating systems – Automatic control – Water
Patent

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Dual regulator direct-fired steam generator

Liquid heaters and vaporizers – Regulation
Patent

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Profile ID: LFUS-PAI-P-157976

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