Duck Sik Park

7 Patents

• US123319592025

  Heat Exchanger Unit

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites
• US122416412025

  Air Heating Apparatus

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites
• US119768192024

  Flue Pipe Separation Sensing Apparatus and Boiler Including the Same

  Kyungdong Navien Co., Ltd.

  0 cites
• US118796662024

  Heat Exchanger Unit

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites
• US118352612023

  Heat Exchanger Unit

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites
• US118352622023

  Heat Exchanger Unit

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites
• US115855722023

  Heat Exchanger Unit and Condensing Boiler Using the Same

  KYUNGDONG NAVIEN CO., Ltd.

  0 cites