Ismael Ortiz Ramirez

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Queretaro, MX

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Patents Grantslast 30 patents

Information Patent Grant
Dual format caller ID for both FSK and DTMF caller ID formats
- Patent number 5,907,605
- Issue date May 25, 1999
- Servicios Condumex S.A. de C.V.
- Ismael Ortiz Ramirez
- H04 - ELECTRIC COMMUNICATION TECHNIQUE