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2021307398913 – Design patent certificate (stamped) (3)

2021307398913 – Design patent certificate (stamped) (3)

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202123141991X – utility model patent certificate (stamped)

202123141991X – utility model patent certificate (stamped)

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Wenzhou Zhengyuan Electronics – 2023228104788 clip-type induction color test pen – Niu Chunjiu – 20240618 – utility model patent certificate (1)

Wenzhou Zhengyuan Electronics – 2023228104788 clip-type induction color test pen – Niu Chunjiu – 20240618 – utility model patent certificate (1)

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Car test pen (EW168 design patent)

Car test pen (EW168 design patent)

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301 utility model patent

301 utility model patent

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202123141991X – certificate (new 12 utility model patent)

202123141991X – certificate (new 12 utility model patent)

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Wenzhou Zhengyuan Electronics – 2023306744585 clip-type induction color test pen – Niu Chunjiu – 20240507 – design patent certificate (1)

Wenzhou Zhengyuan Electronics – 2023306744585 clip-type induction color test pen – Niu Chunjiu – 20240507 – design patent certificate (1)

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Test pen – design patent certificate (58 design patent) (1)

Test pen – design patent certificate (58 design patent) (1)

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