Inventor: Heemskerk, Harold
Inventor: Noodelijk, Robert
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beekenkamp, Annie Cornelia
Inventor: Bruinen, Edward
Inventor: Bruinen, Edward
Inventor: Noodelijk, Robert
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Spruit, Adrianus Theodorus
Inventor: Beers, Martinus Petrus
Inventor: Beers, Martinus Petrus
Inventor: Johnn Lee Thompson
Inventor: William Flemer, III
Inventor: William Flemer, III
Inventor: Albert J. Porter
Inventor: Richard Wellington
Inventor: Reed, George M.
Inventor: Boer, Arie F. den
Inventor: Etter, Albert F.
Inventor: Etter, Albert F.