Inventor: Geerlings Lommerse, Petronella Maria
Inventor: de Jong, Jacobus Robertus
Inventor: de Jong, Jacobus Robertus
Inventor: Skelton, Donald Alfred
Inventor: Skelton, Donald Alfred
Inventor: Skelton, Donald Alfred
Inventor: de Jong, Jacobus Robertus
Inventor: de Jong, Jacobus Robertus
Inventor: Skelton, Donald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Skelton, Donald
Inventor: Skelton, Donald
Inventor: Skelton, Donald
Inventor: Skelton, Donald
Inventor: Skelton, Donald
Inventor: De Jong, Jacobus Robertus
Inventor: Skelton, Donald
Inventor: de Jong, Jacobus Robertus
Inventor: Rasmussen, Lau Lindegaard
Inventor: Rasmussen, Lau Lindegaard
Inventor: Oudshoorn, Hubertus Gerardus
Inventor: Oudshoorn, Hubertus Gerardus