Inventor · disambiguated record
Chang Wan Ryoo
Also filed as: RYOO CHANG WAN
2 granted patents·127 citations·filing 2000–2006
63Inventor score
Top patents by PatentIndex Score
2 records- 0184US6793135B1Electronic payment system using multifunctional prepaid cards and method of selling prepaid cardsDACOM CYBERPASS INC·Filed 2000·Granted Sep 21, 2004·124 cites·9 claims
- 0257US7864933B2System and method for managing prepaid cardGALAXIA COMM INC·Filed 2006·Granted Jan 4, 2011·3 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →