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Inventor

Xuannan Li

Inventor
Heilongjiang, CN

Overview

3→
Patents
2013–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 3 as inventor

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

G08Bprimary
G08BSignalling systems, e.g. personal calling systems20%
H03FAmplifiers20%
H03GControl of amplification20%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers20%
LOC1020%
PatentTitleYear
11,018,644Audio amplifier with embedded buck controller for class-G application20219,536,418'Industrial field real-time working condition radio alarm system'2017D0693254'Portable gas detector'2013

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2013–2017Patents assigned to HARBIN EAST ALARM EQUIP DEV CO (2)· patent assignee history
2013Patents assigned to HARBIN EAST ALARM EQUIPMENT CO LTD (1)· patent assignee history
2013–2017Based in Heilongjiang, CN· patent location history
2017Patents assigned to LI XUANNAN (1)· patent assignee history
2017Patents assigned to LIU JILONG (1)· patent assignee history
2017Patents assigned to MAO FEI (1)· patent assignee history
2021Based in Shenzhen, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HARBIN EAST ALARM EQUIP DEV CO22013–2017
HARBIN EAST ALARM EQUIPMENT CO LTD12013
LI XUANNANself12017
LIU JILONG12017
MAO FEI12017
Locations
LocationPatentsSpan
Heilongjiang, CN22013–2017
Shenzhen, CN12021