Inventor
FRANCA DA FONSECA CARLOS F
AU5 patents
Patents
5 patentsUS9699176B2Jul 4, 2017
CAPTCHA challenge incorporating obfuscated characters
IBM2 citations71
US10033728B2Jul 24, 2018
CAPTCHA challenge incorporating obfuscated characters
IBM0 citations50
US9525686B2Dec 20, 2016
Captcha challenge incorporating obfuscated characters
IBM0 citations50
US9372974B2Jun 21, 2016
CAPTCHA challenge incorporating obfuscated characters
IBM0 citations50
US9338162B2May 10, 2016
CAPTCHA challenge incorporating obfuscated characters
IBM0 citations50