CC

C. Ronald Coffin

📍 Topsfield, MA: #1 of 13 inventorsTop 8%
🗺 Massachusetts: #363 of 6,384 inventorsTop 6%
Overall (2002): #32,052 of 266,432Top 15%
3
Patents 2002

Issued Patents 2002

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6466676 Compound driver for acoustical applications — 2002-10-15
6431309 Loudspeaker system — 2002-08-13
6343128 Dual cone loudspeaker — 2002-01-29