Assignee
Inventors
- Willem Auke Westerhof (24 patents)
- Robert Alexander Van Eibergen Santhagens (12 patents)
- Everhardus Johannes Hoexum (17 patents)
- Ype Brada (21 patents)
- Roelof Steunenberg (3 patents)
- Dirk Hendrik Wevers (10 patents)
US Patent 9333657 · Granted May 10, 2016