Johannes Petrus VAN DER WALT

GL General Mining Union Corporation Limited: 1 patents #1 of 4Top 25%

📍 Roodepoort, ZA: #1 of 4 inventorsTop 25%

Overall (1989): #92,406 of 140,708Top 70%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4805415	Mine cooling	Carl S. J. Van Rensburg	1989-02-21