Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
CY

Ching Han Yu — 4 Patents

PTPolytronics Technology: 4 patents #20 of 58Top 35%
Hualien City, TW: #44 of 223 inventorsTop 20%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Ching Han Yu has been granted 4 US patents while listed as an inventor at Polytronics Technology. The first was granted in 2006 and the most recent in June 2011. Ching Han Yu ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Ching Han Yu in Hualien City, TW.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
7965479 Over-current and over-voltage protection assembly apparatus Pao Hsuan Chen, Tong Cheng Tsai 2011-06-21
7852192 Protective circuit board and overcurrent protection device thereof David Shau Chew Wang, Pao Hsuan Chen 2010-12-14
7205878 Over-current protection device and manufacturing method thereof Zack Lin 2007-04-17
7071810 Over-current protection apparatus Yun-Ching Ma 2006-07-04