LexDanaLexDanabeta
Inventor

Jack Yang Chang

Inventor
Hong Kong, CN

Overview

3→
Patents
2014–2016
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.

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers33%
H04SStereophonic systems33%
LOC1433%
PatentTitleYear
D0770414'Loudspeaker'2016D0710333'Earpiece'2014D0704162'Headphone'2014

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2014Patents assigned to GP ACOUSTICS INTERNAT LTD (2)· patent assignee history
2014–2016Based in Hong Kong, CN· patent location history
2014Based in Kwai Chung, HK· patent location history
2016Patents assigned to GP ACOUSTICS INT LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GP ACOUSTICS INTERNAT LTD22014
GP ACOUSTICS INT LTD12016
Locations
LocationPatentsSpan
Hong Kong, CN22014–2016
Kwai Chung, HK12014