Donald C. Panek Jr.

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East Brunswick, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
DTMF signaling on four-wire switched 56 KBPS lines
- Patent number 5,748,637
- Issue date May 5, 1998
- Integrated Network Corporation
- Daniel M. Joffe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DTMF Signaling on four-wire switched 56 Kbps Lines
- Patent number 5,457,690
- Issue date Oct 10, 1995
- Integrated Network Corporation
- Daniel M. Joffe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE