Assignee
Inventors
- Ferdinand Allard De Vos (18 patents)
- Hendrik Jan Jonkers (2 patents)
- Hermanus Laurentius Zomerdijk (10 patents)
- Michael George Lourentius Koopman (6 patents)
- Pieter Willem Vonk (19 patents)
- Willem Cornelis Steenbergen (7 patents)
US Patent 8308535 · Granted Nov 13, 2012