For the Inventor, By the Inventor

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Portland, ME, United States of America

Chapman Corporation

USPTO Granted Patents = 3

Trademarks = 1

Forward Citations = 19

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5 inventors (with patents filed for the assignee):

Chandler G Sinnett (2 out of 3 patents)

Donald G Parent (1 out of 22 patents)

Ralph W Swanson (1 out of 1 patent)

4. Daniel F Gagnon (1 out of 2 patents)

5. Marshall Edward Hall (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 6075449 - Performance indicator for an electrical static eliminator device (2000-06-13),

2. 5836044 - Surface cleaner and collector system (1998-11-17),

3. 5008594 - Self-balancing circuit for convection air ionizers (1991-04-16),

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USPTO Data Jan 1 1976 - Sep 22 2026

3 Patents

#22 in Portland, ME

#126 in Maine

#73,717 in US

Portland, ME, United States of America

Chapman Corporation

Forward Citations = 19

5 inventors:

Chandler G Sinnett (2 out of 3 patents)

Donald G Parent (1 out of 22 patents)

Ralph W Swanson (1 out of 1 patent)

4. Daniel F Gagnon (1 out of 2 patents)

5. Marshall Edward Hall (1 out of 1 patent)

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