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Inventor

CHAO-KAI CHANG

Inventor
TW

Overview

3→
Patents
2022–2023
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

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

H04Nprimary
H04NPictorial communication, e.g. television20%
A61BDiagnosis10%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light10%
G02BOptical elements, systems or apparatus10%
G02CSpectacles10%
G06FElectric digital data processing10%
G06TImage data processing or generation, in general10%
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 systems10%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use10%
PatentTitleYear
11,789,259Vision inspection and correction method, together with the system apparatus thereof202311,647,280Apparatus and method for lowering power dissipation based on operation between dual processors202311,476,772Voltage converter circuit for converting AC voltage to DC voltage2022

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2022Patents assigned to EPISTAR CORP (1)· patent assignee history
2022–2023Based in TW· patent location history
2023Patents assigned to PASSION LIGHT INC (1)· patent assignee history
2023Patents assigned to SIGMASTAR TECHNOLOGY LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EPISTAR CORP12022
PASSION LIGHT INC12023
SIGMASTAR TECHNOLOGY LTD12023
Locations
LocationPatentsSpan
TW32022–2023