Mark J. O'Brien

Person

Hiawatha, IA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Systems and methods for receiving telephone calls via instant messa...
- Patent number 8,553,857
- Issue date Oct 8, 2013
- Verizon Business Global LLC
- Joel Hanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual PBX system
- Patent number 7,496,091
- Issue date Feb 24, 2009
- Verizon Business Global LLC
- Thomas J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Systems and methods for receiving telephone calls via instant messa...
- Patent number 7,274,778
- Issue date Sep 25, 2007
- Verizon Business Global LLC
- Joel Hanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual PBX system
- Patent number 6,775,272
- Issue date Aug 10, 2004
- MCI, Inc.
- Thomas J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual PBX system
- Patent number 6,724,754
- Issue date Apr 20, 2004
- WorldCom, Inc.
- Thomas J. Galvin
Information Patent Grant
Systems and methods for receiving telephone calls via instant messa...
- Patent number 6,697,474
- Issue date Feb 24, 2004
- WorldCom, Inc.
- Joel Hanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual PBX system
- Patent number 6,393,017
- Issue date May 21, 2002
- WorldCom, Inc.
- Thomas J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Virtual second line hybrid network communication system
- Patent number 6,351,464
- Issue date Feb 26, 2002
- MCI WorldCom, Inc.
- Tom J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SYSTEMS AND METHODS FOR RECEIVING TELEPHONE CALLS VIA INSTANT MESSA...
- Publication number 20070230673
- Publication date Oct 4, 2007
- VERIZON BUSINESS GLOBAL LLC
- Joel Hanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Virtual PBX system
- Publication number 20040160951
- Publication date Aug 19, 2004
- WorldCom, Inc.
- Thomas J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Systems and methods for receiving telephone calls via instant messa...
- Publication number 20040161089
- Publication date Aug 19, 2004
- Joel Hanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Virtual PBX system
- Publication number 20020114329
- Publication date Aug 22, 2002
- WorldCom, INC.
- Thomas J. Galvin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Mark J. O'Brien

Person

Patents Grantslast 30 patents

Systems and methods for receiving telephone calls via instant messa...

Virtual PBX system

Systems and methods for receiving telephone calls via instant messa...

Virtual PBX system

Virtual PBX system

Systems and methods for receiving telephone calls via instant messa...

Virtual PBX system

Virtual second line hybrid network communication system

Patents Applicationslast 30 patents

SYSTEMS AND METHODS FOR RECEIVING TELEPHONE CALLS VIA INSTANT MESSA...

Virtual PBX system

Systems and methods for receiving telephone calls via instant messa...

Virtual PBX system