Inventor
TSAI LEI-LUNG
TW44 patents
⚠️ This page may combine multiple inventors who share the name “TSAI LEI-LUNG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PRIMAX ELECTRONICS LTD
40 patentsUS11175444B1Nov 16, 2021
Luminous keyboard and backlight module thereof
PRIMAX ELECTRONICS LTD10 citations85
US10509482B1Dec 17, 2019
Keyboard device
PRIMAX ELECTRONICS LTD7 citations81
US10410807B2Sep 10, 2019
Luminous keyboard
PRIMAX ELECTRONICS LTD5 citations73
US10153106B1Dec 11, 2018
Keyboard structure
PRIMAX ELECTRONICS LTD2 citations73
US10115542B1Oct 30, 2018
Keyboard
PRIMAX ELECTRONICS LTD5 citations73
US10777371B1Sep 15, 2020
Key structure
PRIMAX ELECTRONICS LTD6 citations71
US10600591B2Mar 24, 2020
Luminous keyboard having translucent light diffusing rubber domes
PRIMAX ELECTRONICS LTD2 citations71
US10312035B2Jun 4, 2019
Luminous keyboard
PRIMAX ELECTRONICS LTD2 citations71
US10903024B1Jan 26, 2021
Keyboard device
PRIMAX ELECTRONICS LTD4 citations70
US9633800B1Apr 25, 2017
Key structure
PRIMAX ELECTRONICS LTD3 citations70
US11456128B1Sep 27, 2022
Key structure
PRIMAX ELECTRONICS LTD2 citations69
US11177091B1Nov 16, 2021
Keyboard device
PRIMAX ELECTRONICS LTD4 citations69
US11289283B1Mar 29, 2022
Key structure and rubber dome thereof
PRIMAX ELECTRONICS LTD1 citations62
US11177092B1Nov 16, 2021
Keyboard device and key structure thereof
PRIMAX ELECTRONICS LTD1 citations62
US11177083B1Nov 16, 2021
Key structure
PRIMAX ELECTRONICS LTD1 citations62
US10242819B1Mar 26, 2019
Mechanical key structure
PRIMAX ELECTRONICS LTD1 citations62
US11626259B1Apr 11, 2023
Membrane circuit structure
PRIMAX ELECTRONICS LTD0 citations61
US11624867B1Apr 11, 2023
Keycap, method of manufacturing the same and key structure
PRIMAX ELECTRONICS LTD0 citations60
US12211657B2Jan 28, 2025
Keycap
PRIMAX ELECTRONICS LTD1 citations59
US10236142B2Mar 19, 2019
Luminous keyboard
PRIMAX ELECTRONICS LTD1 citations59
US12374511B2Jul 29, 2025
Keycap
PRIMAX ELECTRONICS LTD0 citations57
US12131876B2Oct 29, 2024
Membrane switch
PRIMAX ELECTRONICS LTD0 citations52
US11574780B2Feb 7, 2023
Key structure
PRIMAX ELECTRONICS LTD0 citations52
US11289281B1Mar 29, 2022
Key structure
PRIMAX ELECTRONICS LTD0 citations52
US11120956B1Sep 14, 2021
Keyboard device
PRIMAX ELECTRONICS LTD0 citations52
US10153104B1Dec 11, 2018
Keyboard structure with electrostatic discharge protection
PRIMAX ELECTRONICS LTD1 citations52
US12266484B2Apr 1, 2025
Force-sensitive key module and force-sensitive switch structure thereof
PRIMAX ELECTRONICS LTD0 citations50
US11610745B1Mar 21, 2023
Key structure
PRIMAX ELECTRONICS LTD0 citations50
US11342133B1May 24, 2022
Key structure
PRIMAX ELECTRONICS LTD0 citations50
US11145474B1Oct 12, 2021
Keyboard device and key structure thereof
PRIMAX ELECTRONICS LTD0 citations50
US11887792B1Jan 30, 2024
Keyboard device and key structure thereof
PRIMAX ELECTRONICS LTD0 citations49
US11430620B1Aug 30, 2022
Keyboard device and key structure thereof
PRIMAX ELECTRONICS LTD0 citations49
US11011330B2May 18, 2021
Keyboard device
PRIMAX ELECTRONICS LTD0 citations49
US10755873B2Aug 25, 2020
Membrane circuit board and keyboard device with same
PRIMAX ELECTRONICS LTD0 citations42
US10170254B1Jan 1, 2019
Key structure
PRIMAX ELECTRONICS LTD0 citations42
US9741506B1Aug 22, 2017
Keyboard device
PRIMAX ELECTRONICS LTD0 citations42
US9627157B1Apr 18, 2017
Keyboard
PRIMAX ELECTRONICS LTD0 citations42
US10403452B1Sep 3, 2019
Keyboard device
PRIMAX ELECTRONICS LTD0 citations39
US10020139B2Jul 10, 2018
Key structure
PRIMAX ELECTRONICS LTD0 citations39
US9972464B2May 15, 2018
Key structure
PRIMAX ELECTRONICS LTD0 citations39