Inventor: Greyvenstein, Ockert F. C.
Inventor: Geerlings Lommerse, Petronella Maria
Inventor: de Jong, Jacobus Robertus
Inventor: de Jong, Jacobus Robertus
Inventor: de Jong, Jacobus Robertus
Inventor: de Jong, Jacobus Robertus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Hoekstra-Arisz, Catharina Marie
Inventor: Stemkens, Henricus G. W.
Inventor: De Jong, Jacobus Robertus