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Patents Grants
last 30 patents
Information
Patent Grant
Double-wall spiral welded pipe and manufacturing method thereof
Patent number
11,796,092
Issue date
Oct 24, 2023
NANJING LIANZHONG ENGINEERING TECHNOLOGY CO., LTD
Fujun Zhan
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Box-type pipeline with circumferential obtuse angle connection
Patent number
10,648,152
Issue date
May 12, 2020
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD
Fujun Zhan
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Large-aperture spiral welded steel pipe with metal linings and manu...
Patent number
10,145,502
Issue date
Dec 4, 2018
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD.
Fujun Zhan
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Underground steel-concrete structure pipeline with spiral composite...
Patent number
10,030,792
Issue date
Jul 24, 2018
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD.
Fujun Zhan
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Patents Applications
last 30 patents
Information
Patent Application
LARGE-DIAMETER THIN-WALL SPIRAL WELDED PIPE AND METHOD FOR MANUFACT...
Publication number
20240183467
Publication date
Jun 6, 2024
NANJING DADE STEEL PIPE CO., LTD.
Fujun ZHAN
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
LARGE-DIAMETER SPIRAL WELDED STEEL PIPE WITH COMPOSITE STRUCTURE WA...
Publication number
20240183466
Publication date
Jun 6, 2024
NANJING DADE STEEL PIPE CO., LTD.
Fujun ZHAN
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
DOUBLE-WALL SPIRAL WELDED PIPE AND MANUFACTURING METHOD THEREOF
Publication number
20220373109
Publication date
Nov 24, 2022
NANJING LIANZHONG ENGINEERING TECHNOLOGY CO., LTD
Fujun ZHAN
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
CORNER CONNECTING STRUCTURE FOR BOX-LIKE PIPELINE OR CONTAINER OF C...
Publication number
20220136540
Publication date
May 5, 2022
NANJING LIANZHONG ENGINEERING TECHNOLOGY CO., LTD
Fujun ZHAN
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
BOX-TYPE PIPELINE WITH CIRCUMFERENTIAL OBTUSE ANGLE CONNECTION
Publication number
20190071838
Publication date
Mar 7, 2019
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOL TECHNOLOGY CO., LTD
Fujun ZHAN
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Application
Corner Connection Structure of Steel Structure Comprehensive Pipe G...
Publication number
20190003144
Publication date
Jan 3, 2019
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD
Fujun ZHAN
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
LARGE-APERTURE SPIRAL WELDED STEEL PIPE WITH METAL LININGS AND MANU...
Publication number
20160356413
Publication date
Dec 8, 2016
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD.
Fujun ZHAN
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
UNDERGROUND STEEL-CONCRETE STRUCTURE PIPELINE WITH SPIRAL COMPOSITE...
Publication number
20160319962
Publication date
Nov 3, 2016
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO., LTD.
Fujun ZHAN
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING