JM

John L. Markham

📍 Nederland, CO: #2 of 15 inventorsTop 15%
🗺 Colorado: #140 of 1,784 inventorsTop 8%
Overall (1994): #29,372 of 165,921Top 20%
2
Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5339911 Cathodic protection and leak detection process and apparatus Timothy A. Whited, Jack L. Leatherman 1994-08-23
5305631 Cathodic protection and leak detection process and apparatus Timothy A. Whited, Jack L. Leatherman 1994-04-26