Inventor

Qingfeng Guo

Inventor

Beijing, CN

Overview

2012–2017

Patent span

Fixed constructions

Primary field (CPC E)

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary

E21BEarth or rock drilling25%

G05FSystems for regulating electric or magnetic variables25%

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems25%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications25%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

2012Patents assigned to GREE ELECTRIC APPLIANCES INC (1)· patent assignee history

2012Patents assigned to GUO QINGFENG (1)· patent assignee history

2012Patents assigned to MI XUETAO (1)· patent assignee history

2012Patents assigned to XU MIN (1)· patent assignee history

2012Based in Guangdong, CN· patent location history

2017Patents assigned to DRILLING RES INST OF CHINA NAT PETROLEUM COMPANY (1)· patent assignee history

2017Based in Beijing, CN· patent location history

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DRILLING RES INST OF CHINA NAT PETROLEUM COMPANY	1	2017
GREE ELECTRIC APPLIANCES INC	1	2012
GUO QINGFENGself	1	2012
MI XUETAO	1	2012
XU MIN	1	2012

Locations

Location	Patents	Span
Beijing, CN	1	2017
Guangdong, CN	1	2012