Inventor: Osiecki, Marian
Inventor: Osiecki, Marian
Inventor: Osiecki, Marian
Inventor: Osiecki, Marian
Inventor: Osiecki, Marian
Inventor: Brouwer, Wim A. J.
Inventor: Van Andel, Otto Jan Robert
Inventor: Brouwer, Wilhelmus A. J.
Inventor: Osiecki, Marian Wincenty
Inventor: Brouwer, Wilhelmus A. J.