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CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.

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  • Changzhou, CN
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    LASER LINE-PROJECTION DEVICE
    • Publication number 20250146818
    • Publication date May 8, 2025
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    CONSTRUCTION SURFACE FLATNESS DETECTOR
    • Publication number 20240295396
    • Publication date Sep 5, 2024
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    A LASER DIODE CONTROL METHOD AND CONTROL SYSTEM, AND A LASER DEVICE
    • Publication number 20240235153
    • Publication date Jul 11, 2024
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    LASER SURVEYING SYSTEM FOR SETTING OUT
    • Publication number 20240210540
    • Publication date Jun 27, 2024
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    A LASER RECEIVING DEVICE
    • Publication number 20240142579
    • Publication date May 2, 2024
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    A LASER DIODE CONTROL METHOD AND CONTROL SYSTEM, AND A LASER DEVICE
    • Publication number 20240136789
    • Publication date Apr 25, 2024
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL SYSTEM OF LASER MARKING INSTRUMENT AND LASER MARKING INSTRU...
    • Publication number 20220146844
    • Publication date May 12, 2022
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • Ou Zhang
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL PATH STRUCTURE AND LASER LIGHT PROJECTOR USING OPTICAL PATH...
    • Publication number 20220140562
    • Publication date May 5, 2022
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • Ou Zhang
    • G02 - OPTICS
  • Information Patent Application

    MEASURING TOOL
    • Publication number 20210190948
    • Publication date Jun 24, 2021
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    LASER MEASURING SYSTEM
    • Publication number 20210080346
    • Publication date Mar 18, 2021
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • G02 - OPTICS
  • Information Patent Application

    LASER POINT PROJECTING DEVICE
    • Publication number 20200192207
    • Publication date Jun 18, 2020
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Application

    LASER LEVEL RULER
    • Publication number 20190162536
    • Publication date May 30, 2019
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • G01 - MEASURING TESTING
  • Information Patent Application

    A LASER CONTROL CIRCUIT, CONTROL METHOD AND LASER INK LINE DEVICE W...
    • Publication number 20170149208
    • Publication date May 25, 2017
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou ZHANG
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Adjusting Mechanism and Laser Collimator Having the Same
    • Publication number 20160103295
    • Publication date Apr 14, 2016
    • Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd
    • Ou Zhang
    • G02 - OPTICS
  • Information Patent Application

    LASER MODULE CONTROL CIRCUIT
    • Publication number 20150340839
    • Publication date Nov 26, 2015
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • Ou Zhang
    • H01 - BASIC ELECTRIC ELEMENTS

Trademarklast 30 trademarks

  • Information Trademark

    90763313 - HDOEI KEEP DOING LEVEL BEST
    • Serial number 90763313
    • Filing date Jun 9, 2021
    • CHANGZHOU HUADA KEJIE OPTO-ELECTRO INSTRUMENT CO., LTD.
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments