Kai Fei

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Changzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Optical path structure and laser light projector using optical path...
- Patent number 12,068,570
- Issue date Aug 20, 2024
- Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.
- Ou Zhang
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Laser level
- Patent number 10,712,154
- Issue date Jul 14, 2020
- Leica Geosystems AG
- Kai Fei
- G01 - MEASURING TESTING
Information Patent Grant
Window module, a window and laser line projector with the window
- Patent number 9,791,271
- Issue date Oct 17, 2017
- Changzhou Huada Kejie Opto-Electro Instruction Co. Ltd
- Ou Zhang
- G01 - MEASURING TESTING
Information Patent Grant
Cross line laser
- Patent number 9,316,498
- Issue date Apr 19, 2016
- Changzhou Huada Kejie Opto-Electro Instrument Co., LTD.
- Ou Zhang
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

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
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
LASER LEVEL
- Publication number 20190011258
- Publication date Jan 10, 2019
- Leica Geosystems AG
- Kai FEI
- G01 - MEASURING TESTING
Information Patent Application
Window Module, A Window and Laser Line Projector With the Window
- Publication number 20150268044
- Publication date Sep 24, 2015
- Changzhou Huada Kejie Opto-Electro Instruction Co. Ltd
- Ou Zhang
- G01 - MEASURING TESTING
Information Patent Application
Cross Line Laser
- Publication number 20150052763
- Publication date Feb 26, 2015
- Ou Zhang
- G01 - MEASURING TESTING