Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
PL

Petrocarbon Developments Limited

Rank (All Time): #68,983 of 106,127Top 70%
10 inventors
8 Patents All Time

Top Inventors at Petrocarbon Developments Limited All Time

Showing 1–10 of 10 inventors

RankNamePatents
1 Wieslaw H. Isalski 4
2 Terence R. Tomlinson 3
3 Gregory J. Ashton 2
3 Melvyn Duckett 2
#5 Colin Hubbard 1
#5 David I. Limb 1
#5 David Salisbury 1
#5 Donald R. Cummings 1
#5 Martin S. W. Ruhemann 1
#5 Alan A. Haslam 1