Assignee
Inventors
- Willem Grisnich (2 patents)
- Fokeltje A. Koldijk (5 patents)
- Adrianus Jozephus Hendricus Lansbergen (9 patents)
- Albertus Johannes Reuvers (3 patents)
- Stefan Hendrikus Maria Willems (1 patents)
US Patent 9023933 · Granted May 5, 2015