Inventor

SANCHEZ ENRIQUE FRANCISCO

US2 patents

Patents

2 patents

US7242759B1Jul 10, 2007

System and method for enhanced origination services for toll free telephone calls

INTERMETRO COMMUNICATIONS INC19 citations85

US7953218B2May 31, 2011

System and method for enhanced origination services for toll free telephone calls

INTERMETRO COMMUNICATIONS INC14 citations76