Xin Lingyun

5 Patents

• USD09945212023

  Wired Doorbell

  0 cites
• USD09937982023

  Battery Doorbell

  0 cites
• USD09874602023

  Contact Sensor

  0 cites
• USD09876512023

  Dongle

  0 cites
• USD09824672023

  Chime

  0 cites