JP

John Pringle

CL Coal Industry (Patents) Limited: 2 patents #41 of 230Top 20%
📍 Tewkesbury, GB: #14 of 46 inventorsTop 35%
Overall (All Time): #2,333,740 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4877418 Briquette treatment process Joseph Goleczka, Walter Harris 1989-10-31
4738685 Coal briquetting process Joseph Goleczka, Walter Harris 1988-04-19