GR

Graham T. Relf

VI Vickers: 2 patents #29 of 188Top 20%
Overall (All Time): #2,369,796 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4255966 Hardness testing apparatus John N. Batie, Geoffrey A Wilkin 1981-03-17
4222262 Hardness testing apparatus John N. Batie, Geoffrey A Wilkin 1980-09-16