Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
CD

Colin Duffill — 2 Patents

APAea Technology Plc: 1 patents #20 of 68Top 30%
BPBritish Gas Plc: 1 patents #111 of 134Top 85%
Norton, GB: #77 of 216 inventorsTop 40%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Colin Duffill has been granted 2 US patents while listed as an inventor at Aea Technology Plc. The first was granted in 1980 and the most recent in August 2000. Colin Duffill ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Colin Duffill in Norton, GB.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6105431 Ultrasonic inspection Maurice Geoffrey Silk 2000-08-22
4202216 Ultrasonic testing Reginald B. Bull, Ronald A. Usmar 1980-05-13