P

Inventor

CHANG TSUNG-KAI

TW10 patents
⚠️ This page may combine multiple inventors who share the name “CHANG TSUNG-KAI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TOPRAY TECHNOLOGIES INC

4 patents
US7457062B1Nov 25, 2008

Driving apparatus for fine-tuning focus

TOPRAY TECHNOLOGIES INC4 citations58
US7519286B2Apr 14, 2009

Apparatus of driving lens for focusing

TOPRAY TECHNOLOGIES INC2 citations56
US7492537B2Feb 17, 2009

Focus driving apparatus with impact resistance

TOPRAY TECHNOLOGIES INC0 citations39
US7486594B2Feb 3, 2009

Adjustable optical pickup actuator

TOPRAY TECHNOLOGIES INC0 citations30

GUANGZHOU LUXVISIONS INNOVATION TECH LIMITED

2 patents
US12408253B2Sep 2, 2025

Variable focus flashlight module

GUANGZHOU LUXVISIONS INNOVATION TECH LIMITED0 citations60
US12405468B2Sep 2, 2025

VR equipment

GUANGZHOU LUXVISIONS INNOVATION TECH LIMITED0 citations50

IND TECH RES INST

1 patent
US5777803AJul 7, 1998

Objective lens for optical pick-up head of optical disk drive

IND TECH RES INST62 citations94

LITE ON ELECTRONICS GUANGZHOU LTD

1 patent
US9473010B2Oct 18, 2016

Voice coil motor array module

LITE ON ELECTRONICS GUANGZHOU LTD0 citations51

CADUCEUS BIOTECHNOLOGY INC

1 patent
US10520436B2Dec 31, 2019

Dynamic focusing confocal optical scanning system

CADUCEUS BIOTECHNOLOGY INC0 citations28

CHANG TSUNG-KAI

1 patent
US8291442B2Oct 16, 2012

Electromagnetic actuator of optical pickup head

CHANG TSUNG-KAI0 citations28