Inventor
CHANG HSIEN-TSAN
TW12 patents
⚠️ This page may combine multiple inventors who share the name “CHANG HSIEN-TSAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PRIMAX ELECTRONICS LTD
9 patentsUS9941072B1Apr 10, 2018
Keyboard device
PRIMAX ELECTRONICS LTD2 citations72
US9087662B2Jul 21, 2015
Keyboard with induction antenna arranged under a key
PRIMAX ELECTRONICS LTD4 citations72
US11287899B1Mar 29, 2022
Keyboard device with protecting function and manufacturing method thereof
PRIMAX ELECTRONICS LTD5 citations71
US11456129B1Sep 27, 2022
Key structure
PRIMAX ELECTRONICS LTD0 citations51
US10251264B2Apr 2, 2019
Membrane circuit structure with function expandability
PRIMAX ELECTRONICS LTD0 citations51
US9412536B2Aug 9, 2016
Illuminated keyboard
PRIMAX ELECTRONICS LTD1 citations51
US9905380B2Feb 27, 2018
Magnetic type keyboard and magnetic key thereof
PRIMAX ELECTRONICS LTD1 citations49
US9627158B2Apr 18, 2017
Keyboard key using an asymmetric scissor-type connecting element
PRIMAX ELECTRONICS LTD1 citations48
US9214295B2Dec 15, 2015
Key structure
PRIMAX ELECTRONICS LTD0 citations39