Inventor: de Ruyver, Kurt
Inventor: Hoekert, Hendrick Cozijn
Inventor: Hoekert, Hendrick Cozijn
Inventor: Hall, Elsie Kazerine
Inventor: Hall, Elsie Kazerine
Inventor: Hall, Elsie Kazerine
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Hoekert, Hendrick Cozijn
Inventor: Hoekert, Hendrick Cozijn
Inventor: Hoekert, Hendrick Cozijn
Inventor: Koning, Lammert
Inventor: Cevasco, Jr., Robert
Inventor: Koning, Lammert