Assignee
Inventors
- Johann Heinrich Tönsing (12 patents)
- Roelof Nico DuToit (3 patents)
- Gysbert Floris van Beek Van Leeuwen (3 patents)
- Jan Niel Viljoen (1 patents)
- David Wells (20 patents)
- Leon Johannes Brits (3 patents)
- Jan Christoffel DuToit (3 patents)