Patent
Patentdatenbank USA 1858
- Patent:US21236 17.08.1858 L.N. Nutz I.B. Randle E. Hibbard : improvement in addometers
- Patent:US21243 24.08.1858 Jabez Burns : Machine for adding numbers
- Patent:US21621 28.09.1858 John B. Newbrough, St. Louis, Mo. : Machine for Adding Numbers
- Patent:US21921 26.10.1858 Young, Samuel S. (P) : Arithmetical Proof Rule
- Patent:US21941 02.11.1858 Orlando L. Castle, Upper Alton, Ill. : Arithmometer for Addition
- Patent:USRe551 11.05.1858 Orlando L. Castle : Prepared Arithmometer for Adding