Pumping unit
Latest Daqing Dannuo Petroleum Technology Development Co., Ltd. Patents:
Description
Claims
The ornamental design for pumping unit, as shown and described.
Referenced Cited
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Patent History
Patent number: D835678
Type: Grant
Filed: Jul 8, 2017
Date of Patent: Dec 11, 2018
Assignee: Daqing Dannuo Petroleum Technology Development Co., Ltd. (Ranghu Dist., Daqing, Heilongjiang)
Inventor: Zhishen Su (Heilongjiang)
Primary Examiner: Ralf Seifert
Application Number: 29/610,041
Type: Grant
Filed: Jul 8, 2017
Date of Patent: Dec 11, 2018
Assignee: Daqing Dannuo Petroleum Technology Development Co., Ltd. (Ranghu Dist., Daqing, Heilongjiang)
Inventor: Zhishen Su (Heilongjiang)
Primary Examiner: Ralf Seifert
Application Number: 29/610,041
Classifications
Current U.S. Class:
Pump Or Compressor (D15/7)