Patents - Notes Keywords
model 1870/09/13 -> 107414 - > 
model 1871/11/14 -> 120822 - > 
model 1872/01/23 -> 122991 - > 
model 1872/06/11 -> 127678 - > 
model 1876/08/01 -> 180504 - > 
model 1879/09/30 -> 220152 - > 
model 1882/04/11 -> 256159 - > 
model 1882/11/28 -> 268142 - > 
model 1887/04/12 -> 360861 - > 
model 1887/08/09 -> 367829 - > 
model 1890/12/09 -> 442559 - > 
model 1920/04/20 -> 1337674 - > 
12 Patents Listed