CC

C. Ronald Coffin

📍 Topsfield, MA: #6 of 15 inventorsTop 40%
🗺 Massachusetts: #740 of 6,583 inventorsTop 15%
Overall (2004): #71,094 of 270,089Top 30%
2
Patents 2004

Issued Patents 2004

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6778677 Repairable electromagnetic linear motor for loudspeakers and the like — 2004-08-17
6714656 Loudspeaker system with dust protection — 2004-03-30