Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025

Showing 1–4 of 4 inventors

Rank Inventor Primary Company Patents
1 Johannes Cornelius Antonius Martens 1
1 Johannes Wilhelmus Henricus van Rijzingen Varco I/P 1
1 Johannes M. De Bont 1
1 Alfred van Eck Keystone International 1