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USPTO Patent Rankings Data through Sept 30, 2025
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Hak-Do Yoo — 3 Patents

SISiltron: 3 patents #13 of 72Top 20%
Seoul, KR: #14,539 of 39,741 inventorsTop 40%
Overall (All Time): #1,597,489 of 4,157,543Top 40%
3 Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6858077 Single crystalline silicon wafer, ingot, and producing method thereof Hong-Woo Lee, Joon-Young Choi, Hyon-Jong Cho 2005-02-22
6527859 Apparatus for growing a single crystalline ingot Hong-Woo Lee, Joon-Young Choi, Hyon-Jong Cho 2003-03-04
6521316 single crystalline silicon wafer, ingot, and producing method thereof Hong-Woo Lee, Joon-Young Choi, Hyon-Jong Cho 2003-02-18