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Inventor profile of:

Qingfeng Yu

City:

Yantai

Country:

China

Published Applications:

4

Last publication date:

2022-10-27

Top Assignees for applications by Qingfeng Yu

The entities that hold a legal rights for patent applications filed by inventor Yu Qingfeng:

YANTAI JEREH OIL-FIELD SERVICES GROUP CO., LTD 1 Yantai, Shandong, China
JEREH C-CREATE TECHNOLOGY CO., LTD. 1 Yantai, Shandong, China
YANTAI JEREH PRETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD. 1 Yantai, Shandong, China
YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD. 1 Yantai, China
YANTAI JEREH OILFIELD SERVICES GROUP Co., Ltd. 1 Yantai, Shandong, China
YANTAI JEREH PETROLEUM EQUIP. AND TECH. Co., Ltd. 1 Yantai, Shandong, China

Recent patent applications by Yu Qingfeng

Qingfeng Yu from Yantai, CN has applied for patents for these inventions. The list has both pending applications and granted patents:

#1 | 2022-10-27

US20220339646A1

Performing operations; transporting

ELECTROSTATIC SPRAY DEVICE

#2 | 2022-10-06

US20220314248A1

Performing operations; transporting

Nozzle assembly, ejecting device and ejecting method

#3 | 2015-07-23

US20150204148A1

Fixed constructions

Continuous oil pipe clamp mechanism

#4 | 2014-01-02

US20140000868A1

Fixed constructions

Floating clamping device for injection head of continuous oil pipe

InventorID:

591877 ⎘