Song Li

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Tangshan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Rotary printing integrated ink box for seal printing
- Patent number 11,518,178
- Issue date Dec 6, 2022
- Haiming United Energy Group Matrixnets Tech Co Ltd
- Haiming Sang
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Intelligent seal with cloud computing-based anti-forgery capability...
- Patent number 11,474,758
- Issue date Oct 18, 2022
- HAIMING UNITED ENERGY GROUP JUWANG TECHNOLOGY CO., LTD.
- Haiming Sang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Seal printer
- Patent number 11,390,069
- Issue date Jul 19, 2022
- HAIMING UNITED ENERGY GROUP JUWANG TECHNOLOGY CO., LTD.
- Haiming Sang
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
ROTARY PRINTING INTEGRATED INK BOX SPECIAL FOR SEAL PRINTING
- Publication number 20210379904
- Publication date Dec 9, 2021
- HAIMING UNITED ENERGY GROUP MATRIXNETS TECHNOLOGY CO, LTD.
- Haiming SANG
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
SEAL PRINTER
- Publication number 20210187942
- Publication date Jun 24, 2021
- HAIMING UNITED ENERGY GROUP JUWANG TECHNOLOGY CO., LTD.
- Haiming Sang
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
INTELLIGENT SEAL WITH CLOUD COMPUTING-BASED ANTI-FORGERY CAPABILITY
- Publication number 20210191671
- Publication date Jun 24, 2021
- HAIMING UNITED ENERGY GROUP JUWANG TECHNOLOGY CO., LTD.
- Haiming SANG
- G06 - COMPUTING CALCULATING COUNTING