Membership
Tour
Register
Log in
Dean Umberger
Follow
Person
Stouchsburg, PA, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Returning ringing signals through the tip amplifier of subscriber-l...
Patent number
6,925,178
Issue date
Aug 2, 2005
Legerity, Inc.
John C. Gammel
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Low operating power, high voltage ringing switch circuit
Patent number
6,333,664
Issue date
Dec 25, 2001
Agere Systems Guardian Corp.
Dean M. Umberger
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Overvoltage protector
Patent number
5,631,797
Issue date
May 20, 1997
Lucent Technologies Inc.
David P. Chabinec
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
High sensitivity control circuit for optical solid-state relays
Patent number
5,532,498
Issue date
Jul 2, 1996
AT&T Corp.
Dean M. Umberger
H03 - BASIC ELECTRONIC CIRCUITRY
Patents Applications
last 30 patents
Information
Patent Application
Returning ringing signals through the tip amplifier of subscriber-l...
Publication number
20040086106
Publication date
May 6, 2004
Legerity, Inc., a Delaware corporation
John C. Gammel
H04 - ELECTRIC COMMUNICATION TECHNIQUE