For the Inventor, By the Inventor

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Dedham, MA, United States of America

Intertech Engineering Associates, Inc.

USPTO Granted Patents = 2

Forward Citations = 41

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4 inventors (with patents filed for the assignee):

David A Vogel (2 out of 6 patents)

Danny C Vogel (2 out of 2 patents)

Diane P Cherry (2 out of 2 patents)

4. Edward R Coleman (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5604794 - Switch system for directing call from a calling to a receiving instrument (1997-02-18),

2. 5056132 - Switch device adapted to interface between an incoming telephone line (1991-10-08),

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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#6 in Dedham, MA

#4,825 in Massachusetts

#92,697 in US

Dedham, MA, United States of America

Intertech Engineering Associates, Inc.

Forward Citations = 41

4 inventors:

David A Vogel (2 out of 6 patents)

Danny C Vogel (2 out of 2 patents)

Diane P Cherry (2 out of 2 patents)

4. Edward R Coleman (1 out of 1 patent)

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