Assignee
Inventors
- Pieter Johannes Marius Van Groos (6 patents)
- Jan Frederik Hoogkamp (14 patents)
- Josephus Cornelius Johannes Antonius Vugts (6 patents)
- Robert Gordon Livesey (7 patents)
- Johannes Hendrikus Gertrudis Franssen (10 patents)
- Albert Jan Hendrik Klomp (5 patents)
- Johannes Petrus Martinus Bernardus Vermeulen (69 patents)
- Erik Roelof Loopstra (328 patents)