TREA

Qianjia Ma

Follow

Person

  • Zhengzhou, CN
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Keys and locks
    • Patent number 11,790,711
    • Issue date Oct 17, 2023
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Key and lock set
    • Patent number 11,055,938
    • Issue date Jul 6, 2021
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Keys and locks
    • Patent number 10,529,161
    • Issue date Jan 7, 2020
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    KEYS AND LOCKS
    • Publication number 20210312735
    • Publication date Oct 7, 2021
    • Yaowu MA
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    KEYS AND LOCKS
    • Publication number 20200143616
    • Publication date May 7, 2020
    • Yaowu MA
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    High Air-Tightness Device
    • Publication number 20170222388
    • Publication date Aug 3, 2017
    • Yaowu Ma
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Vehicle Key Apparatus
    • Publication number 20170088099
    • Publication date Mar 30, 2017
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Keys and Locks
    • Publication number 20160371907
    • Publication date Dec 22, 2016
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL