Inventor
CHANG SHENG-FAN
TW10 patents
Patents
10 patentsUS10777371B1Sep 15, 2020
Key structure
PRIMAX ELECTRONICS LTD6 citations71
US11626259B1Apr 11, 2023
Membrane circuit structure
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US12211657B2Jan 28, 2025
Keycap
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US12374511B2Jul 29, 2025
Keycap
PRIMAX ELECTRONICS LTD0 citations57
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
US12362110B2Jul 15, 2025
Keycap
PRIMAX ELECTRONICS LTD0 citations46
US10699858B2Jun 30, 2020
Keyboard device
PRIMAX ELECTRONICS LTD0 citations38
US10832877B2Nov 10, 2020
Keycap forming method
PRIMAX ELECTRONICS LTD0 citations37