Inventor: Greyvenstein, Ockert F. C.
Inventor: Moore, Peter R.
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Stemkens, Henricus G. W.
Inventor: Stommel, John R., Griesbach, Robert J.
Inventor: Unger, Christiaan
Inventor: Stommel, John R., Griesbach, Robert J.
Inventor: Griesbach, Robert J., Stommel, John R.
Inventor: Holtrop, Mathilde H.